祁南煤礦安全改建工程風(fēng)井揭煤防突專項(xiàng)設(shè)計(jì)04.07

PAGE1淮北礦業(yè)（集團(tuán)）公司祁南煤礦安全改建工程風(fēng)井揭1、2煤層（組）專項(xiàng)防突設(shè)計(jì)祁南煤礦安全改建工程籌備處2013年4月7日PAGE119審批記錄會(huì)審主持人:單位姓名日期編制單位設(shè)計(jì)審核科長會(huì)審生產(chǎn)技術(shù)部機(jī)電科安監(jiān)處地測(cè)科調(diào)度信息中心淮武監(jiān)理機(jī)電副總批準(zhǔn)總工程師會(huì)審意見1風(fēng)井概況1.1風(fēng)井井筒概況風(fēng)井井筒凈直徑7.5m，井筒設(shè)計(jì)深度為1030.0m，其中凍結(jié)段深度389.0m。風(fēng)井井筒基巖段主要技術(shù)特征如下：井筒井口絕對(duì)標(biāo)高為+24.0m；井筒荒直徑8.8m，凈直徑7.5m，井筒凈斷面44.2m2；井口設(shè)計(jì)坐標(biāo)：緯距X=3703860.000，經(jīng)距Y=39504590.000。1.2風(fēng)井井筒所揭煤層基本情況根據(jù)淮北礦業(yè)集團(tuán)勘探工程有限公司所繪制的祁南煤礦安全改建工程風(fēng)井井筒預(yù)想地質(zhì)柱狀圖（圖1-1），可知風(fēng)井井筒掘進(jìn)期間將依次揭穿1、2煤層（組），井筒揭煤共計(jì)7次，其中煤厚大于0.5m的共3次，煤厚大于1.0m的1次。風(fēng)井井筒所揭煤層情況見表1-1。表1-1風(fēng)井揭煤情況表井筒名稱煤層見煤深度（m）煤厚（m）層間距（m）風(fēng)井1上1煤846.65～847.000.35--1上2煤864.60～865.050.4517.601上3煤871.39～871.990.606.341煤880.55～881.540.998.5623上1煤945.99～946.440.4564.4523上2煤952.50～952.850.356.0623煤964.11～965.291.1811.26圖1-1風(fēng)井井檢孔井筒地質(zhì)剖面圖1.3煤層瓦斯賦存情況1.3.11煤層（組）1煤層（組）位于上石盒子組中下部，是區(qū)內(nèi)最上一個(gè)煤層組，下距23煤層62～104m，一般75m左右，1煤組含2～4個(gè)分層，厚度達(dá)到可采的分層位于煤組的下部，據(jù)祁南煤礦報(bào)告，取樣8個(gè)，7個(gè)點(diǎn)原煤灰分超過40%，最高達(dá)52.74%。為不可采煤層（組）。根據(jù)《淮北礦業(yè)（集團(tuán)）有限責(zé)任公司祁南煤礦安全改建工程井田煤與瓦斯突出危險(xiǎn)性評(píng)估報(bào)告》：祁南煤礦安全改建工程井田1煤層（組）-970m以淺區(qū)域無煤與瓦斯突出危險(xiǎn)性。但是，由于1煤層（組）在地勘時(shí)期未測(cè)得煤層瓦斯含量數(shù)據(jù)及相關(guān)瓦斯突出參數(shù)，因此建議礦井在揭1煤層（組）時(shí)應(yīng)采取局部綜合防突措施，保證井筒安全揭煤。1.3.22煤層（組）2煤層（組）位于上石盒子組下部，下距32煤層83～125m，一般105m左右。煤層厚度0～1.07m，平均0.54m。2煤層（組）在井田內(nèi)普遍發(fā)育，但煤分層薄，可采點(diǎn)分布零散，可采區(qū)面積小，連續(xù)性差，故祁南煤礦深部勘探（延深）報(bào)告評(píng)價(jià)2煤層（組）為不可采煤層。根據(jù)《淮北礦業(yè)（集團(tuán)）有限責(zé)任公司祁南煤礦安全改建工程井田煤與瓦斯突出危險(xiǎn)性評(píng)估報(bào)告》：祁南煤礦安全改建工程井田2煤層（組）-970m以淺區(qū)域無煤與瓦斯突出危險(xiǎn)性。但是，由于2煤層（組）揭煤深度大，因此建議礦井在揭2煤層（組）時(shí)應(yīng)采取局部綜合防突措施，保證井筒安全揭煤。2立井揭煤作業(yè)流程2.1豎井揭煤作業(yè)流程為了保證揭煤整體工作的連續(xù)性和安全性，按照“區(qū)域防突措施先行，局部防突措施補(bǔ)充”的要求，將揭煤作業(yè)的整個(gè)內(nèi)容進(jìn)行重新定義，即從距煤層最小法向距離15m（地質(zhì)構(gòu)造復(fù)雜、巖石破碎的區(qū)域法距20m）之前至穿過突出煤層頂板（底板）法線距離大于2m的全部作業(yè)過程。其整體作業(yè)流程見圖2-1所示。距煤層法距不小于10m處距煤層法距不小于10m處（地質(zhì)構(gòu)造帶20m處）正常掘進(jìn)距煤層法距不小于7m處煤層瓦斯賦存情況分析控制層位鉆孔區(qū)域預(yù)測(cè)無效區(qū)域措施效果檢驗(yàn)施工瓦斯抽排鉆孔補(bǔ)充區(qū)域防突措施有效保障型措施有突出危險(xiǎn)瓦斯抽排強(qiáng)化措施安全防護(hù)措施遠(yuǎn)距離放炮揭穿（開）煤層穿過煤層進(jìn)入底板巖層距煤層法距2m以上正常掘進(jìn)距煤層法距不小于1.5~2m處局部“四位一體”正常掘進(jìn)距煤層法距5m處無突出危險(xiǎn)加強(qiáng)支護(hù)圖2-1石門（立井）及巖石井巷揭煤施工流程圖3風(fēng)井安全揭穿1、2煤層（組）防突專項(xiàng)設(shè)計(jì)為了保證揭煤安全及縮短揭煤工期，根據(jù)祁南煤礦安全改建工程煤層賦存情況及風(fēng)井揭煤實(shí)際情況（表1-2），經(jīng)研究決定將1煤層（組）分為兩組分別進(jìn)行揭煤作業(yè)，其中：第一組為揭1上1煤層；第二組為揭1上2、1上3、1煤層共三個(gè)煤層。2煤層（組）分為兩組分別進(jìn)行揭煤作業(yè)，其中：第一組為揭23上1和23上2煤層；第二組為揭23煤層。為了做到有計(jì)劃、有步驟、及時(shí)、安全、快速揭煤，根據(jù)風(fēng)井井筒和煤層情況，特制訂了揭煤過程中防治煤與瓦斯突出的技術(shù)措施如下：3.1井筒揭1上1煤層防突專項(xiàng)設(shè)計(jì)3.1.1距離煤層法距15m處的安全技術(shù)措施在該位置施工前探鉆孔，它有兩個(gè)作用，一是用來探明煤層賦存和地質(zhì)構(gòu)造情況；二是用來預(yù)測(cè)煤層突出危險(xiǎn)性和取煤樣進(jìn)行突出指標(biāo)的測(cè)定。3.1.1.1前探鉆孔布置為準(zhǔn)確控制煤層的層位，掌握煤層的賦存條件、地質(zhì)構(gòu)造等，當(dāng)井筒施工至井深831.10m，即距1上1煤層最小法向距離15m處（地質(zhì)構(gòu)造復(fù)雜、巖石破碎的區(qū)域在距煤層法距20m處，即井深826.08m處），從井壁角開孔施工5個(gè)穿透煤層全厚且進(jìn)入底板不小于0.5m的控制煤層層位鉆孔（前探鉆孔），確保在煤層傾向上布置3個(gè)鉆孔、走向上布置2個(gè)鉆孔，鉆孔控制井筒輪廓外15m范圍，如圖3-1所示，前探鉆孔施工參數(shù)如表3-0所示。5個(gè)前探鉆孔中4個(gè)兼做測(cè)壓孔。前探鉆孔見1上1煤后，至少取3份1上1煤層煤樣，每份煤樣不低于3.5kg，用于取樣測(cè)定吸附常數(shù)a、b值及瓦斯放散初速度和煤的堅(jiān)固性系數(shù)f值。詳細(xì)記錄每一鉆孔實(shí)際施工過程中的數(shù)據(jù)，并對(duì)探煤情況對(duì)控制范圍進(jìn)行反算，保證前探鉆孔終孔位于煤層底板0.5m處，見煤點(diǎn)距井筒輪廓線外15m。若施工中存在其他因素影響需調(diào)整好開孔位置時(shí)，應(yīng)根據(jù)實(shí)際開孔情況對(duì)鉆孔參數(shù)進(jìn)行修正。圖3-1前探鉆孔布置示意圖表3-0前探鉆孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m備注1#050.0923.88探煤、取樣兼做測(cè)壓孔2#9046.6622.36探煤、取樣兼做測(cè)壓孔3#18042.7320.92探煤、取樣兼做測(cè)壓孔4#27046.6622.36探煤、取樣兼做測(cè)壓孔5#--9016.40探煤，井筒中心線在施工前探鉆孔的同時(shí)，可以測(cè)試1上1煤層的鉆屑瓦斯解吸指標(biāo)、值，配合區(qū)域預(yù)測(cè)指標(biāo)的測(cè)定來預(yù)測(cè)煤層突出危險(xiǎn)性。3.1.1.2瓦斯壓力測(cè)定鉆孔布置根據(jù)祁南煤礦安全改建工程風(fēng)井揭煤實(shí)際情況，為了保證揭煤安全及縮短揭煤工期，利用前探鉆孔進(jìn)行煤層原始瓦斯壓力測(cè)試工作。測(cè)壓鉆孔施工參數(shù)見表3-1。表3-1煤層瓦斯壓力測(cè)定鉆孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1#050.0923.882#9046.6622.363#18042.7320.924#27046.6622.36測(cè)壓鉆孔施工及布置要求：測(cè)壓鉆孔開孔點(diǎn)布置在巖層完整地點(diǎn)，所有測(cè)壓鉆孔必須采用放水裝置。測(cè)壓步驟及時(shí)間安排：打鉆；取芯；下測(cè)壓管、封孔；待水泥漿液凝固安裝壓力表；定期觀測(cè)壓力示數(shù)直至壓力表讀數(shù)穩(wěn)定，時(shí)間至少3天，直至壓力變化小于0.005MPa/d為止，并詳細(xì)記錄壓力上升與時(shí)間的關(guān)系。測(cè)壓所需材料及具體封孔步驟見附錄1。3.1.1.3區(qū)域突出危險(xiǎn)性預(yù)測(cè)出現(xiàn)下列三種情況之一的即預(yù)測(cè)工作面前方所揭煤層有突出危險(xiǎn)性：1）煤層瓦斯壓力≥0.74MPa或煤層瓦斯含量W≥8m3/t；2）鉆屑指標(biāo)法所測(cè)數(shù)值超過臨界值；表3-2鉆屑指標(biāo)法預(yù)測(cè)立井揭煤工作面突出危險(xiǎn)性的臨界值Δh2/PaK1/mL/(g·min1/2)突出危險(xiǎn)性干煤濕煤干煤濕煤≥200≥160≥0.5≥0.4突出危險(xiǎn)工作面＜200＜160＜0.5＜0.4無突出危險(xiǎn)工作面3）各類鉆孔施工過程中出現(xiàn)吸鉆、頂鉆、噴孔等動(dòng)力現(xiàn)象。經(jīng)區(qū)域突出危險(xiǎn)性預(yù)測(cè)，豎井揭煤處存在突出危險(xiǎn)時(shí)，必須在距煤層法距不小于7m處采取區(qū)域防突措施；當(dāng)預(yù)測(cè)為無突出危險(xiǎn)時(shí)，對(duì)于深部煤層（埋深大于500m）建議在距煤層法距不小于7m處采取施工部分抽排鉆孔措施。經(jīng)區(qū)域預(yù)測(cè)為無突出危險(xiǎn)區(qū)域和已消突區(qū)域的需采用局部“四位一體”綜合防突措施。3.1.2距離煤層法距7m處的安全技術(shù)措施3.1.2.1瓦斯排放鉆孔布置若區(qū)域突出危險(xiǎn)性預(yù)測(cè)結(jié)果為1上1煤層具有煤與瓦斯突出危險(xiǎn)性，根據(jù)相關(guān)規(guī)定，在井筒施工至煤層法距7m處時(shí)應(yīng)施工瓦斯排放鉆孔。根據(jù)祁南煤礦安全改建工程井筒施工情況和煤層賦存條件（1上1煤層煤厚0.35m），并考慮到此次揭煤所處的大深度、高地應(yīng)力環(huán)境會(huì)顯著增加煤層的煤與瓦斯突出危險(xiǎn)性，設(shè)計(jì)7圈瓦斯排放鉆孔控制井筒輪廓線外12m以內(nèi)區(qū)域1上1煤層（考慮排放半徑影響，鉆孔實(shí)際影響范圍將超過13m），排放鉆孔采用均勻布孔的原則，鉆孔直徑113mm，鉆孔需穿透煤層底板0.5m?？紤]到現(xiàn)場鉆機(jī)施工條件，排放孔最外圈鉆孔從井壁上0.5m開孔，第2圈從井壁角開孔，其他圈依次向內(nèi)0.3m，井筒輪廓線內(nèi)用傘鉆施工鉆孔，并可以根據(jù)實(shí)際條件多打鉆孔。瓦斯排放鉆孔布置如圖3-2（由外向內(nèi)依次為第1圈、第2圈、第3圈……），鉆孔孔號(hào)排序及各圈鉆孔孔底見煤間距情況如圖3-3所示（鉆孔編號(hào)以正北方向?yàn)?#，順時(shí)針排序），各個(gè)鉆孔的施工參數(shù)見表3-3～表3-9。當(dāng)煤層松軟、地質(zhì)構(gòu)造比較復(fù)雜，煤層瓦斯壓力較大、瓦斯含量較高，煤層具有突出危險(xiǎn)性時(shí)，待排放鉆孔施工完畢后，鉆孔進(jìn)行掃孔沖煤工作，并在排放鉆孔中按“三星”布置插入直徑為75mm的花管作為金屬骨架，金屬骨架應(yīng)穿過煤層進(jìn)入底板深度不小于0.5m，經(jīng)過一段瓦斯排放時(shí)間后，向鉆孔內(nèi)注入馬麗散，待其凝固后以起到加固煤體的作用。圖3-2法距7m處瓦斯排放鉆孔布置示意圖圖3-3鉆孔孔號(hào)排序及孔底見煤間距情況示意圖表3-3法距7m處瓦斯排放鉆孔施工參數(shù)表（第1圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1-1#0.0040.0216.271-27#180.0028.9214.311-2#6.9239.9916.261-28#186.9228.9614.321-3#13.8539.8816.241-29#193.8529.1014.331-4#20.7739.7116.201-30#200.7729.3314.361-5#27.6939.4616.141-31#207.6929.6414.411-6#34.6239.1616.081-32#214.6230.0214.461-7#41.5438.7915.991-33#221.5430.4814.521-8#48.4638.3615.901-34#228.4631.0014.601-9#55.3837.8715.801-35#235.3831.5714.681-10#62.3137.3415.691-36#242.3132.1814.781-11#69.2336.7615.581-37#249.2332.8314.881-12#76.1536.1515.461-38#256.1533.4914.991-13#83.0835.5015.341-39#263.0834.1715.101-14#90.0034.8415.221-40#270.0034.8415.221-15#96.9234.1715.101-41#276.9235.5015.341-16#103.8533.4914.991-42#283.8536.1515.461-17#110.7732.8314.881-43#290.7736.7615.581-18#117.6932.1814.781-44#297.6937.3415.691-19#124.6231.5714.681-45#304.6237.8715.801-20#131.5431.0014.601-46#311.5438.3615.901-21#138.4630.4814.521-47#318.4638.7915.991-22#145.3830.0214.461-48#325.3839.1616.081-23#152.3129.6414.411-49#332.3139.4616.141-24#159.2329.3314.361-50#339.2339.7116.201-25#166.1529.1014.331-51#346.1539.8816.241-26#173.0828.9614.321-52#353.0839.9916.26表3-4法距7m處瓦斯排放鉆孔施工參數(shù)表（第2圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m2-1#0.0043.1314.302-24#180.0032.3712.442-2#7.8343.0814.292-25#187.8332.4312.452-3#15.6542.9514.262-26#195.6532.6012.472-4#23.4842.7414.222-27#203.4832.8812.512-5#31.3042.4514.152-28#211.3033.2612.562-6#39.1342.0714.072-29#219.1333.7412.632-7#46.9641.6213.982-30#226.9634.2912.702-8#54.7841.1113.872-31#234.7834.9212.802-9#62.6140.5313.762-32#242.6135.5912.902-10#70.4339.8913.632-33#250.4336.3013.012-11#78.2639.2213.512-34#258.2637.0313.132-12#86.0938.5113.382-35#266.0937.7713.252-13#93.9137.7713.252-36#273.9138.5113.382-14#101.7437.0313.132-37#281.7439.2213.512-15#109.5736.3013.012-38#289.5739.8913.632-16#117.3935.5912.902-39#297.3940.5313.762-17#125.2234.9212.802-40#305.2241.1113.872-18#133.0434.2912.702-41#313.0441.6213.982-19#140.8733.7412.632-42#320.8742.0714.072-20#148.7033.2612.562-43#328.7042.4514.152-21#156.5232.8812.512-44#336.5242.7414.222-22#164.3532.6012.472-45#344.3542.9514.262-23#172.1732.4312.452-46#352.1743.0814.29表3-5法距7m處瓦斯排放鉆孔施工參數(shù)表（第3圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m3-1#0.0047.8112.963-21#180.0038.2811.173-2#9.0047.7612.953-22#189.0038.3511.183-3#18.0047.6112.913-23#198.0038.5511.213-4#27.0047.3612.853-24#207.0038.8811.263-5#36.0047.0212.773-25#216.0039.3211.333-6#45.0046.5912.683-26#225.0039.8711.413-7#54.0046.0812.573-27#234.0040.4911.513-8#63.0045.4912.443-28#243.0041.1811.633-9#72.0044.8512.313-29#252.0041.9111.753-10#81.0044.1512.173-30#261.0042.6611.893-11#90.0043.4112.033-31#270.0043.4112.033-12#99.0042.6611.893-32#279.0044.1512.173-13#108.0041.9111.753-33#288.0044.8512.313-14#117.0041.1811.633-34#297.0045.4912.443-15#126.0040.4911.513-35#306.0046.0812.573-16#135.0039.8711.413-36#315.0046.5912.683-17#144.0039.3211.333-37#324.0047.0212.773-18#153.0038.8811.263-38#333.0047.3612.853-19#162.0038.5511.213-39#342.0047.6112.913-20#171.0038.3511.183-40#351.0047.7612.95表3-6法距7m處瓦斯排放鉆孔施工參數(shù)表（第4圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m4-1#0.0053.5811.724-18#185.4545.7110.054-2#10.9153.5211.704-19#196.3645.8710.084-3#21.8253.3411.654-20#207.2746.2010.134-4#32.7353.0411.584-21#218.1846.6610.224-5#43.6452.6411.484-22#229.0947.2410.324-6#54.5552.1311.354-23#240.0047.9110.454-7#65.4551.5311.214-24#250.9148.6310.594-8#76.3650.8611.064-25#261.8249.3910.744-9#87.2750.1410.904-26#272.7350.1410.904-10#98.1849.3910.744-27#283.6450.8611.064-11#109.0948.6310.594-28#294.5551.5311.214-12#120.0047.9110.454-29#305.4552.1311.354-13#130.9147.2410.324-30#316.3652.6411.484-14#141.8246.6610.224-31#327.2753.0411.584-15#152.7346.2010.134-32#338.1853.3411.654-16#163.6445.8710.084-33#349.0953.5211.704-17#174.5545.7110.05表3-7法距7m處瓦斯排放鉆孔施工參數(shù)表（第5圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m5-1#0.0060.7110.625-15#186.6754.929.125-2#13.3360.6410.605-16#200.0055.109.165-3#26.6760.4510.535-17#213.3355.459.245-4#40.0060.1210.445-18#226.6755.949.355-5#53.3359.6810.315-19#240.0056.539.485-6#66.6759.1510.155-20#253.3357.199.645-7#80.0058.539.995-21#266.6757.879.815-8#93.3357.879.815-22#280.0058.539.995-9#106.6757.199.645-23#293.3359.1510.155-10#120.0056.539.485-24#306.6759.6810.315-11#133.3355.949.355-25#320.0060.1210.445-12#146.6755.459.245-26#333.3360.4510.535-13#160.0055.109.165-27#346.6760.6410.605-14#173.3354.929.12表3-8法距7m處瓦斯排放鉆孔施工參數(shù)表（第6圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m6-1#0.0069.439.716-12#188.5766.008.476-2#17.1469.369.686-13#205.7166.188.526-3#34.2969.179.606-14#222.8666.508.636-4#51.4368.859.476-15#240.0066.948.776-5#68.5768.449.316-16#257.1467.448.946-6#85.7167.969.136-17#274.2967.969.136-7#102.8667.448.946-18#291.4368.449.316-8#120.0066.948.776-19#308.5768.859.476-9#137.1466.508.636-20#325.7169.179.606-10#154.2966.188.526-21#342.8669.369.686-11#171.4366.008.47表3-9法距7m處瓦斯排放鉆孔施工參數(shù)表（第7圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m7-1#0.0079.779.057-8#180.0078.538.147-2#25.7179.729.007-9#205.7178.608.197-3#51.4379.568.887-10#231.4378.788.317-4#77.1479.328.707-11#257.1479.058.497-5#102.8679.058.497-12#282.8679.328.707-6#128.5778.788.317-13#308.5779.568.887-7#154.2978.608.197-14#334.2979.729.00注：工程量圈序1234567合計(jì)孔數(shù)（個(gè)）52464033272114233工程量（m）793.24613.8483.62358.74266.26190.75120.332826.743.1.2.2區(qū)域防突措施效果檢驗(yàn)瓦斯經(jīng)過一段時(shí)間排放后，能夠安全揭煤的條件為（瓦斯排放區(qū)域）：1）鉆孔瓦斯解吸指標(biāo)（、）達(dá)到表3-2的要求；2）煤層殘余瓦斯壓力P<0.74MPa；3）瓦斯排放率至少在50％以上；4）采用壓風(fēng)沖煤掃孔技術(shù)加速煤層瓦斯排放時(shí)，在進(jìn)行效果檢驗(yàn)時(shí)可排放鉆孔沖出煤量作為參考指標(biāo)，沖出煤量為鉆孔控制范圍內(nèi)煤量的2%左右。具體方法是：在排放鉆孔以外設(shè)計(jì)施工5個(gè)測(cè)壓鉆孔，分布在措施孔控制煤層區(qū)域的四周和中間。區(qū)域防突措施效果檢驗(yàn)孔布置如圖3-4，鉆孔施工參數(shù)見表3-10：封孔后測(cè)定煤層殘余瓦斯壓力，用以檢驗(yàn)瓦斯壓力是否降低到0.74MPa以下。在施工測(cè)壓鉆孔的過程中，同時(shí)測(cè)定煤層的鉆屑瓦斯解吸指標(biāo)（、），并取樣測(cè)試煤層殘余瓦斯含量。當(dāng)指標(biāo)超過臨界值時(shí)，進(jìn)行補(bǔ)打排放鉆孔，直到消除突出危險(xiǎn)性；揭煤前每施工一個(gè)循環(huán)均需進(jìn)行效果檢驗(yàn)。圖3-4區(qū)域防突措施校檢孔布置示意圖表3-10區(qū)域防突措施校檢孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1#036.6816.712#9031.1415.693#18029.5413.144#27048.2911.025#--908.353.1.3距離煤層法距5m處的安全技術(shù)措施3.1.3.1工作面突出危險(xiǎn)性預(yù)測(cè)1上1煤層經(jīng)區(qū)域突出危險(xiǎn)性預(yù)測(cè)為無突出危險(xiǎn)，或雖具有突出危險(xiǎn)性但區(qū)域防突措施效果經(jīng)檢驗(yàn)有效，掘進(jìn)至距1上1煤層法距5m時(shí)，需再次進(jìn)行區(qū)域驗(yàn)證，區(qū)域驗(yàn)證采用鉆屑指標(biāo)法進(jìn)行。若區(qū)域驗(yàn)證為無突出危險(xiǎn)性，應(yīng)當(dāng)采取安全防護(hù)措施后進(jìn)行采掘作業(yè)。只要有一次區(qū)域驗(yàn)證為有突出危險(xiǎn)性或超前鉆孔等發(fā)現(xiàn)了突出預(yù)兆，則井筒揭煤必須采取局部綜合防突措施。根據(jù)要求從井壁角開孔向煤層布置5個(gè)預(yù)測(cè)孔如圖3-5所示，預(yù)測(cè)孔施工參數(shù)見表3-11。圖3-5法距5m處工作面突出危險(xiǎn)性預(yù)測(cè)孔布置示意圖表3-11法距5m處工作面突出危險(xiǎn)性預(yù)測(cè)孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1#038.8511.562#9039.859.123#18033.568.404#27049.447.695#--905.843.1.3.2瓦斯排放鉆孔布置經(jīng)局部預(yù)測(cè)有突出危險(xiǎn)性或超前鉆孔等發(fā)現(xiàn)了突出預(yù)兆時(shí)必須采取工作面局部綜合防突措施。在距1上1煤層法距5m處采取超前排放鉆孔措施，自然釋放煤層的瓦斯。鉆孔孔徑113mm，必須穿透煤層全厚。根據(jù)工作面突出危險(xiǎn)性預(yù)測(cè)指標(biāo)及埋深、煤厚等情況具體設(shè)計(jì)鉆孔參數(shù)及排放時(shí)間。井筒揭煤工作面鉆孔控制范圍為井筒四周輪廓線外至少8m，鉆孔的孔底間距為2m，均勻布孔。根據(jù)要求布置5圈鉆孔如圖3-6所示，考慮到現(xiàn)場鉆機(jī)施工條件，排放孔最外圈鉆孔從井壁上0.5m開孔，第2圈從井壁角開孔，其他圈依次向內(nèi)0.3m，鉆孔孔號(hào)排序及各圈鉆孔孔底見煤間距情況如圖3-7（鉆孔編號(hào)以正北方向?yàn)?#，順時(shí)針排序）。鉆孔施工參數(shù)見表3-12～表3-16。圖3-6法距5m處瓦斯排放鉆孔布置示意圖圖3-7鉆孔孔號(hào)排序及孔底見煤間距情況示意圖表3-12法距5m處瓦斯排放鉆孔施工參數(shù)表（第1圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1-1#0.0043.7011.671-21#180.0032.2010.051-2#9.0043.6411.651-22#189.0032.2910.061-3#18.0043.4611.621-23#198.0032.5310.091-4#27.0043.1611.571-24#207.0032.9310.131-5#36.0042.7511.501-25#216.0033.4610.191-6#45.0042.2411.411-26#225.0034.1210.261-7#54.0041.6211.301-27#234.0034.8810.351-8#63.0040.9211.191-28#243.0035.7110.451-9#72.0040.1311.061-29#252.0036.5910.561-10#81.0039.2910.941-30#261.0037.5010.681-11#90.0038.4110.811-31#270.0038.4110.811-12#99.0037.5010.681-32#279.0039.2910.941-13#108.0036.5910.561-33#288.0040.1311.061-14#117.0035.7110.451-34#297.0040.9211.191-15#126.0034.8810.351-35#306.0041.6211.301-16#135.0034.1210.261-36#315.0042.2411.411-17#144.0033.4610.191-37#324.0042.7511.501-18#153.0032.9310.131-38#333.0043.1611.571-19#162.0032.5310.091-39#342.0043.4611.621-20#171.0032.2910.061-40#351.0043.6411.65表3-13法距5m處瓦斯排放鉆孔施工參數(shù)表（第2圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m2-1#0.0049.139.772-18#185.4538.398.252-2#10.9149.059.762-19#196.3638.628.282-3#21.8248.819.712-20#207.2739.078.332-4#32.7348.419.642-21#218.1839.718.402-5#43.6447.879.542-22#229.0940.518.492-6#54.5547.189.432-23#240.0041.438.602-7#65.4546.389.302-24#250.9142.438.732-8#76.3645.479.162-25#261.8243.468.872-9#87.2744.499.012-26#272.7344.499.012-10#98.1843.468.872-27#283.6445.479.162-11#109.0942.438.732-28#294.5546.389.302-12#120.0041.438.602-29#305.4547.189.432-13#130.9140.518.492-30#316.3647.879.542-14#141.8239.718.402-31#327.2748.419.642-15#152.7339.078.332-32#338.1848.819.712-16#163.6438.628.282-33#349.0949.059.762-17#174.5538.398.25表3-14法距5m處瓦斯排放鉆孔施工參數(shù)表（第3圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m3-1#0.0057.408.583-15#186.6749.117.173-2#13.3357.318.563-16#200.0049.377.203-3#26.6757.048.503-17#213.3349.897.273-4#40.0056.598.413-18#226.6750.617.383-5#53.3355.988.283-19#240.0051.477.503-6#66.6755.228.143-20#253.3352.437.653-7#80.0054.357.983-21#266.6753.407.813-8#93.3353.407.813-22#280.0054.357.983-9#106.6752.437.653-23#293.3355.228.143-10#120.0051.477.503-24#306.6755.988.283-11#133.3350.617.383-25#320.0056.598.413-12#146.6749.897.273-26#333.3357.048.503-13#160.0049.377.203-27#346.6757.318.563-14#173.3349.117.17表3-15法距5m處瓦斯排放鉆孔施工參數(shù)表（第4圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m4-1#0.0068.247.614-12#188.5763.336.394-2#17.1468.157.594-13#205.7163.596.454-3#34.2967.887.514-14#222.8664.086.554-4#51.4367.457.384-15#240.0064.726.694-5#68.5766.877.224-16#257.1465.456.864-6#85.7166.197.044-17#274.2966.197.044-7#102.8665.456.864-18#291.4366.877.224-8#120.0064.726.694-19#308.5767.457.384-9#137.1464.086.554-20#325.7167.887.514-10#154.2963.596.454-21#342.8668.157.594-11#171.4363.336.39表3-16法距5m處瓦斯排放鉆孔施工參數(shù)表（第5圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m5-1#0.0081.886.975-8#180.0080.506.055-2#25.7181.826.925-9#205.7180.586.105-3#51.4381.656.805-10#231.4380.796.235-4#77.1481.396.615-11#257.1481.096.415-5#102.8681.096.415-12#282.8681.396.615-6#128.5780.796.235-13#308.5781.656.805-7#154.2980.586.105-14#334.2981.826.92注：工程量圈序12345合計(jì)孔數(shù)（個(gè)）4033272113134工程量（m）433.36296.77212.28146.9778.141167.523.1.3.3局部防突措施效果檢驗(yàn)經(jīng)過一定時(shí)間的瓦斯排放，為考察所施工的瓦斯排放鉆孔的效果，需要向鉆孔所控制的煤層區(qū)域的邊沿打鉆，測(cè)定實(shí)施防突措施后的效果，根據(jù)相關(guān)要求從井壁角開孔共布置效果檢驗(yàn)孔5個(gè)，如圖3-8所示，校檢孔施工參數(shù)如表3-17。圖3-8局部防突措施校檢孔布置示意圖表3-17局部防突措施校檢孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1#4537.2311.302#13535.518.603#22535.518.604#31552.608.235#--905.843.1.4距離煤層法距2m處的安全技術(shù)措施經(jīng)過區(qū)域措施效果檢驗(yàn)有效后，采用“局部防突措施”進(jìn)行邊探測(cè)邊掘進(jìn)至距煤層法距1.5～2m處，采用遠(yuǎn)距離放炮揭穿煤層。揭穿煤層后，立即對(duì)過煤段進(jìn)行支護(hù)，考察煤層產(chǎn)狀并取樣進(jìn)行實(shí)驗(yàn)室分析。同時(shí)，還須及時(shí)沿煤層進(jìn)行效果檢驗(yàn)，孔深10m，每層煤驗(yàn)證孔數(shù)不少于5個(gè)；指標(biāo)超限或接近臨界，有頂鉆、噴孔現(xiàn)象時(shí)，必須采取順層鉆孔排放措施。在井筒繼續(xù)施工過程中應(yīng)檢查井筒位置偏斜。3.2井筒揭1上2、1上3及1煤層防突專項(xiàng)設(shè)計(jì)3.2.1距離煤層法距15m處的安全技術(shù)措施3.2.1.1前探鉆孔布置當(dāng)井筒施工至井深849.10m，即距1上2煤層最小法向距離15m處（地質(zhì)構(gòu)造復(fù)雜、巖石破碎的區(qū)域距煤層法距20m處，即井深844.03m處），從井壁角開孔施工11個(gè)穿透煤層全厚且進(jìn)入底板不小于0.5m的前探鉆孔，確保各個(gè)煤層能夠在傾向上布置3個(gè)鉆孔、走向上布置2個(gè)鉆孔，鉆孔控制井筒輪廓外15m范圍，如圖3-9所示，前探鉆孔施工參數(shù)如表3-18所示。11個(gè)前探鉆孔中10個(gè)兼做測(cè)壓孔。前探鉆孔見煤后，每個(gè)煤層至少取3份煤樣，每份煤樣不低于3.5kg，用于取樣測(cè)定吸附常數(shù)a、b值及瓦斯放散初速度和煤的堅(jiān)固性系數(shù)f值。詳細(xì)記錄每一鉆孔實(shí)際施工過程中的數(shù)據(jù)，并對(duì)探煤情況對(duì)控制范圍進(jìn)行反算，保證前探鉆孔終孔位于煤層底板0.5m處，見煤點(diǎn)距井筒輪廓線外15m。若施工中存在其他因素影響需調(diào)整好開孔位置時(shí)，應(yīng)根據(jù)實(shí)際開孔情況對(duì)鉆孔參數(shù)進(jìn)行修正。圖3-9前探鉆孔布置示意圖表3-18前探鉆孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m備注1#051.0224.35探煤、取樣兼做測(cè)壓孔2#9047.7222.80探煤、取樣兼做測(cè)壓孔3#18043.9521.33探煤、取樣兼做測(cè)壓孔4#27047.7222.80探煤、取樣兼做測(cè)壓孔5#4558.4029.12探煤、取樣兼做測(cè)壓孔6#31558.4029.12探煤、取樣兼做測(cè)壓孔7#066.5238.15探煤、取樣兼做測(cè)壓孔8#9065.2236.29探煤、取樣兼做測(cè)壓孔9#18063.7834.45探煤、取樣兼做測(cè)壓孔10#27065.2236.29探煤、取樣兼做測(cè)壓孔11#--9032.99探煤，井筒中心線在施工前探鉆孔的同時(shí)，可以測(cè)試1上2、1上3和1煤層的鉆屑瓦斯解吸指標(biāo)、值，配合區(qū)域預(yù)測(cè)指標(biāo)的測(cè)定來預(yù)測(cè)煤層突出危險(xiǎn)性。3.2.1.2瓦斯壓力測(cè)定鉆孔布置根據(jù)祁南煤礦安全改建工程回風(fēng)井揭煤實(shí)際情況，為了保證揭煤安全及縮短揭煤工期，利用前探鉆孔進(jìn)行煤層原始瓦斯壓力測(cè)試工作。測(cè)壓鉆孔施工參數(shù)見表3-19。表3-19煤層瓦斯壓力測(cè)定鉆孔施工參數(shù)表鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m備注1#051.0224.35封孔至1上2煤頂板，測(cè)1上2煤壓力2#9047.7222.80封孔至1上2煤頂板，測(cè)1上2煤壓力3#18043.9521.33封孔至1上2煤頂板，測(cè)1上2煤壓力4#27047.7222.80封孔至1上2煤頂板，測(cè)1上2煤壓力5#4558.4029.12封孔至1上3煤頂板，測(cè)1上3煤壓力6#31558.4029.12封孔至1上3煤頂板，測(cè)1上3煤壓力7#066.5238.15封孔至1上3煤頂板，測(cè)1上3、1煤綜合壓力8#9065.2236.29封孔至1上3煤頂板，測(cè)1上3、1煤綜合壓力9#18063.7834.45封孔至1上3煤頂板，測(cè)1上3、1煤綜合壓力10#27065.2236.29封孔至1上3煤頂板，測(cè)1上3、1煤綜合壓力測(cè)壓鉆孔施工及布置要求：測(cè)壓鉆孔開孔點(diǎn)布置在巖層完整地點(diǎn)，所有測(cè)壓鉆孔必須采用放水裝置。測(cè)壓步驟及時(shí)間安排：打鉆；取芯；下測(cè)壓管、封孔；待水泥漿液凝固安裝壓力表；定期觀測(cè)壓力示數(shù)直至壓力表讀數(shù)穩(wěn)定，時(shí)間至少3天，直至壓力變化小于0.005MPa/d為止，并詳細(xì)記錄壓力上升與時(shí)間的關(guān)系。測(cè)壓所需材料及具體封孔步驟見附錄1。3.2.1.3區(qū)域突出危險(xiǎn)性預(yù)測(cè)出現(xiàn)下列三種情況之一的即預(yù)測(cè)工作面前方所揭煤層有突出危險(xiǎn)性：1）煤層瓦斯壓力≥0.74MPa或煤層瓦斯含量W≥8m3/t；2）鉆屑指標(biāo)法所測(cè)數(shù)值超過臨界值；3）各類鉆孔施工過程中出現(xiàn)吸鉆、頂鉆、噴孔等動(dòng)力現(xiàn)象。經(jīng)區(qū)域突出危險(xiǎn)性預(yù)測(cè)，豎井揭煤處存在突出危險(xiǎn)時(shí)，必須在距煤層法距不小于7m處采取區(qū)域防突措施；當(dāng)預(yù)測(cè)為無突出危險(xiǎn)時(shí)，對(duì)于深部煤層（埋深大于500m）建議在距煤層法距不小于7m處采取施工部分抽排鉆孔措施。經(jīng)區(qū)域預(yù)測(cè)為無突出危險(xiǎn)區(qū)域和已消突區(qū)域的需采用局部“四位一體”綜合防突措施。3.2.2距離煤層法距7m處的安全技術(shù)措施3.2.2.1瓦斯排放鉆孔布置由于1上2煤層、1上3煤層和1煤層為近距離煤層群賦存，若區(qū)域突出危險(xiǎn)性預(yù)測(cè)結(jié)果中三個(gè)煤層中有任意一個(gè)煤層具有煤與瓦斯突出危險(xiǎn)性，為保證豎井揭煤安全，根據(jù)相關(guān)規(guī)定當(dāng)井筒施工至距離煤層法距7m處時(shí)對(duì)1上2、1上3和1煤層均施工瓦斯排放鉆孔。根據(jù)祁南煤礦安全改建工程井筒施工情況和煤層賦存條件（1上2煤層煤厚0.45m，1上3煤層煤厚0.60m，1煤層煤厚0.99m），并考慮到此次揭煤所處的大深度、高地應(yīng)力環(huán)境會(huì)顯著增加煤層的煤與瓦斯突出危險(xiǎn)性，設(shè)計(jì)9圈瓦斯排放鉆孔（由外向內(nèi)依次為第1圈、第2圈、第3圈……，考慮到現(xiàn)場鉆機(jī)施工條件，排放孔最外圈鉆孔從井壁角開孔，其他圈依次向內(nèi)0.3m）控制井筒輪廓線外15m以內(nèi)區(qū)域1煤層（考慮排放半徑影響，鉆孔實(shí)際影響范圍將超過16m）。此外，補(bǔ)充3圈瓦斯排放鉆孔（由外向內(nèi)依次為外1圈、外2圈、外3圈，開孔位置依次為井壁上1.5m、1.2m、0.9m）控制井筒輪廓線外13m以內(nèi)區(qū)域1上2煤層（考慮排放半徑影響，鉆孔實(shí)際影響范圍接近14m），補(bǔ)充2圈瓦斯排放鉆孔（由外向內(nèi)依次為外4圈、和外5圈，開孔位置依次為井壁上0.6m、0.3m）控制井筒輪廓線外13m以內(nèi)區(qū)域1上3煤層（考慮排放半徑影響，鉆孔實(shí)際影響范圍接近14m），排放鉆孔采用均勻布孔的原則，鉆孔直徑113mm，鉆孔需穿透煤層底板0.5m。井筒輪廓線內(nèi)用傘鉆施工鉆孔，并可以根據(jù)實(shí)際條件多打鉆孔。瓦斯排放鉆孔布置如圖3-10，鉆孔孔號(hào)排序及各圈鉆孔孔底見煤間距情況如圖3-11所示（鉆孔編號(hào)以正北方向?yàn)?#，順時(shí)針排序），各個(gè)鉆孔的施工參數(shù)見表3-20～表3-33。當(dāng)煤層松軟、地質(zhì)構(gòu)造比較復(fù)雜，煤層瓦斯壓力較大、瓦斯含量較高，煤層具有突出危險(xiǎn)性時(shí)，待排放鉆孔施工完畢后，鉆孔進(jìn)行掃孔沖煤工作，并在排放鉆孔中按“三星”布置插入直徑為75mm的花管作為金屬骨架，金屬骨架應(yīng)穿過煤層進(jìn)入底板深度不小于0.5m，經(jīng)過一段瓦斯排放時(shí)間后，向鉆孔內(nèi)注入馬麗散，待其凝固后以起到加固煤體的作用。圖3-10法距7m處瓦斯排放鉆孔布置示意圖圖3-11鉆孔孔號(hào)排序及孔底見煤間距情況示意圖表3-20法距7m處瓦斯排放鉆孔施工參數(shù)表（外1圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1外-1#0.0040.9517.811外-29#183.2730.4015.671外-2#6.5540.9217.811外-30#189.8230.4815.681外-3#13.0940.8317.781外-31#196.3630.6315.711外-4#19.6440.6917.741外-32#202.9130.8615.741外-5#26.1840.4817.691外-33#209.4531.1615.791外-6#32.7340.2217.621外-34#216.0031.5215.851外-7#39.2739.9017.551外-35#222.5531.9515.921外-8#45.8239.5317.461外-36#229.0932.4216.001外-9#52.3639.1117.361外-37#235.6432.9316.091外-10#58.9138.6517.251外-38#242.1833.4916.191外-11#65.4538.1517.131外-39#248.7334.0616.291外-12#72.0037.6217.011外-40#255.2734.6616.401外-13#78.5537.0616.891外-41#261.8235.2716.521外-14#85.0936.4716.771外-42#268.3635.8716.641外-15#91.6435.8716.641外-43#274.9136.4716.771外-16#98.1835.2716.521外-44#281.4537.0616.891外-17#104.7334.6616.401外-45#288.0037.6217.011外-18#111.2734.0616.291外-46#294.5538.1517.131外-19#117.8233.4916.191外-47#301.0938.6517.251外-20#124.3632.9316.091外-48#307.6439.1117.361外-21#130.9132.4216.001外-49#314.1839.5317.461外-22#137.4531.9515.921外-50#320.7339.9017.551外-23#144.0031.5215.851外-51#327.2740.2217.621外-24#150.5531.1615.791外-52#333.8240.4817.691外-25#157.0930.8615.741外-53#340.3640.6917.741外-26#163.6430.6315.711外-54#346.9140.8317.781外-27#170.1830.4815.681外-55#353.4540.9217.811外-28#176.7330.4015.67表3-21法距7m處瓦斯排放鉆孔施工參數(shù)表（外2圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m2外-1#0.0044.4016.002外-26#183.6734.4213.942外-2#7.3544.3615.992外-27#191.0234.5213.952外-3#14.6944.2615.962外-28#198.3734.7013.982外-4#22.0444.0815.912外-29#205.7134.9814.022外-5#29.3943.8415.852外-30#213.0635.3314.082外-6#36.7343.5315.772外-31#220.4135.7614.162外-7#44.0843.1615.682外-32#227.7636.2514.242外-8#51.4342.7315.582外-33#235.1036.7914.342外-9#58.7842.2515.462外-34#242.4537.3814.442外-10#66.1241.7215.342外-35#249.8038.0014.562外-11#73.4741.1515.212外-36#257.1438.6414.682外-12#80.8240.5515.082外-37#264.4939.2814.812外-13#88.1639.9214.942外-38#271.8439.9214.942外-14#95.5139.2814.812外-39#279.1840.5515.082外-15#102.8638.6414.682外-40#286.5341.1515.212外-16#110.2038.0014.562外-41#293.8841.7215.342外-17#117.5537.3814.442外-42#301.2242.2515.462外-18#124.9036.7914.342外-43#308.5742.7315.582外-19#132.2436.2514.242外-44#315.9243.1615.682外-20#139.5935.7614.162外-45#323.2743.5315.772外-21#146.9435.3314.082外-46#330.6143.8415.852外-22#154.2934.9814.022外-47#337.9644.0815.912外-23#161.6334.7013.982外-48#345.3144.2615.962外-24#168.9834.5213.952外-49#352.6544.3615.992外-25#176.3334.4213.94表3-22法距7m處瓦斯排放鉆孔施工參數(shù)表（外3圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m3外-1#0.0048.7514.253外-23#184.1939.6112.283外-2#8.3748.7114.243外-24#192.5639.7312.303外-3#16.7448.5814.203外-25#200.9339.9512.343外-4#25.1248.3814.153外-26#209.3040.2712.403外-5#33.4948.0914.073外-27#217.6740.6912.473外-6#41.8647.7313.983外-28#226.0541.1912.563外-7#50.2347.3013.873外-29#234.4241.7512.663外-8#58.6046.8113.753外-30#242.7942.3712.783外-9#66.9846.2613.623外-31#251.1643.0212.913外-10#75.3545.6613.483外-32#259.5343.6913.053外-11#83.7245.0213.333外-33#267.9144.3613.193外-12#92.0944.3613.193外-34#276.2845.0213.333外-13#100.4743.6913.053外-35#284.6545.6613.483外-14#108.8443.0212.913外-36#293.0246.2613.623外-15#117.2142.3712.783外-37#301.4046.8113.753外-16#125.5841.7512.663外-38#309.7747.3013.873外-17#133.9541.1912.563外-39#318.1447.7313.983外-18#142.3340.6912.473外-40#326.5148.0914.073外-19#150.7040.2712.403外-41#334.8848.3814.153外-20#159.0739.9512.343外-42#343.2648.5814.203外-21#167.4439.7312.303外-43#351.6348.7114.243外-22#175.8139.6112.28表3-23法距7m處瓦斯排放鉆孔施工參數(shù)表（外4圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m4外-1#0.0053.1122.264外-29#183.2746.4319.464外-2#6.5553.0922.254外-30#189.8246.4819.484外-3#13.0953.0322.224外-31#196.3646.5819.514外-4#19.6452.9422.174外-32#202.9146.7319.564外-5#26.1852.8122.114外-33#209.4546.9219.634外-6#32.7352.6422.034外-34#216.0047.1519.714外-7#39.2752.4421.934外-35#222.5547.4119.814外-8#45.8252.2121.824外-36#229.0947.7119.924外-9#52.3651.9521.694外-37#235.6448.0420.044外-10#58.9151.6621.564外-38#242.1848.3920.184外-11#65.4551.3421.414外-39#248.7348.7620.324外-12#72.0051.0121.264外-40#255.2749.1420.474外-13#78.5550.6521.104外-41#261.8249.5220.634外-14#85.0950.2820.944外-42#268.3649.9020.784外-15#91.6449.9020.784外-43#274.9150.2820.944外-16#98.1849.5220.634外-44#281.4550.6521.104外-17#104.7349.1420.474外-45#288.0051.0121.264外-18#111.2748.7620.324外-46#294.5551.3421.414外-19#117.8248.3920.184外-47#301.0951.6621.564外-20#124.3648.0420.044外-48#307.6451.9521.694外-21#130.9147.7119.924外-49#314.1852.2121.824外-22#137.4547.4119.814外-50#320.7352.4421.934外-23#144.0047.1519.714外-51#327.2752.6422.034外-24#150.5546.9219.634外-52#333.8252.8122.114外-25#157.0946.7319.564外-53#340.3652.9422.174外-26#163.6446.5819.514外-54#346.9153.0322.224外-27#170.1846.4819.484外-55#353.4553.0922.254外-28#176.7346.4319.46表3-24法距7m處瓦斯排放鉆孔施工參數(shù)表（外5圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m5外-1#0.0056.8020.695外-26#183.6750.9918.075外-2#7.3556.7820.685外-27#191.0251.0418.095外-3#14.6956.7220.655外-28#198.3751.1518.145外-4#22.0456.6220.595外-29#205.7151.3118.205外-5#29.3956.4720.525外-30#213.0651.5118.285外-6#36.7356.2920.425外-31#220.4151.7618.375外-7#44.0856.0820.315外-32#227.7652.0518.495外-8#51.4355.8220.185外-33#235.1052.3718.615外-9#58.7855.5420.045外-34#242.4552.7118.765外-10#66.1255.2319.895外-35#249.8053.0718.915外-11#73.4754.9019.735外-36#257.1453.4419.075外-12#80.8254.5519.575外-37#264.4953.8119.235外-13#88.1654.1919.405外-38#271.8454.1919.405外-14#95.5153.8119.235外-39#279.1854.5519.575外-15#102.8653.4419.075外-40#286.5354.9019.735外-16#110.2053.0718.915外-41#293.8855.2319.895外-17#117.5552.7118.765外-42#301.2255.5420.045外-18#124.9052.3718.615外-43#308.5755.8220.185外-19#132.2452.0518.495外-44#315.9256.0820.315外-20#139.5951.7618.375外-45#323.2756.2920.425外-21#146.9451.5118.285外-46#330.6156.4720.525外-22#154.2951.3118.205外-47#337.9656.6220.595外-23#161.6351.1518.145外-48#345.3156.7220.655外-24#168.9851.0418.095外-49#352.6556.7820.685外-25#176.3350.9918.07注：工程量圈序12345合計(jì)孔數(shù)（個(gè)）5549435549251工程量（m）918.91731.94569.511146.24949.094315.69表3-25法距7m處瓦斯排放鉆孔施工參數(shù)表（第1圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m1-1#0.0060.4831.041-32#180.0056.2027.571-2#5.8160.4731.031-33#185.8156.2127.571-3#11.6160.4431.001-34#191.6156.2527.601-4#17.4260.3930.961-35#197.4256.3127.641-5#23.2360.3230.901-36#203.2356.4027.701-6#29.0360.2430.821-37#209.0356.5027.781-7#34.8460.1330.721-38#214.8456.6327.871-8#40.6560.0130.611-39#220.6556.7727.981-9#46.4559.8830.491-40#226.4556.9428.091-10#52.2659.7330.351-41#232.2657.1128.231-11#58.0659.5630.211-42#238.0657.3028.371-12#63.8759.3830.051-43#243.8757.5028.521-13#69.6859.1929.891-44#249.6857.7128.681-14#75.4858.9929.721-45#255.4857.9328.851-15#81.2958.7929.551-46#261.2958.1429.021-16#87.1058.5829.371-47#267.1058.3629.191-17#92.9058.3629.191-48#272.9058.5829.371-18#98.7158.1429.021-49#278.7158.7929.551-19#104.5257.9328.851-50#284.5258.9929.721-20#110.3257.7128.681-51#290.3259.1929.891-21#116.1357.5028.521-52#296.1359.3830.051-22#121.9457.3028.371-53#301.9459.5630.211-23#127.7457.1128.231-54#307.7459.7330.351-24#133.5556.9428.091-55#313.5559.8830.491-25#139.3556.7727.981-56#319.3560.0130.611-26#145.1656.6327.871-57#325.1660.1330.721-27#150.9756.5027.781-58#330.9760.2430.821-28#156.7756.4027.701-59#336.7760.3230.901-29#162.5856.3127.641-60#342.5860.3930.961-30#168.3956.2527.601-61#348.3960.4431.001-31#174.1956.2127.571-62#354.1960.4731.03表3-26法距7m處瓦斯排放鉆孔施工參數(shù)表（第2圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m2-1#0.0063.1530.052-29#183.2759.5526.842-2#6.5563.1430.042-30#189.8259.5726.862-3#13.0963.1130.012-31#196.3659.6326.902-4#19.6463.0629.962-32#202.9159.7026.962-5#26.1862.9929.882-33#209.4559.8027.042-6#32.7362.9029.792-34#216.0059.9327.142-7#39.2762.7929.682-35#222.5560.0727.262-8#45.8262.6629.562-36#229.0960.2327.392-9#52.3662.5129.422-37#235.6460.4027.532-10#58.9162.3529.262-38#242.1860.5927.682-11#65.4562.1829.102-39#248.7360.7927.852-12#72.0062.0028.932-40#255.2760.9928.022-13#78.5561.8128.752-41#261.8261.1928.202-14#85.0961.6128.572-42#268.3661.4028.392-15#91.6461.4028.392-43#274.9161.6128.572-16#98.1861.1928.202-44#281.4561.8128.752-17#104.7360.9928.022-45#288.0062.0028.932-18#111.2760.7927.852-46#294.5562.1829.102-19#117.8260.5927.682-47#301.0962.3529.262-20#124.3660.4027.532-48#307.6462.5129.422-21#130.9160.2327.392-49#314.1862.6629.562-22#137.4560.0727.262-50#320.7362.7929.682-23#144.0059.9327.142-51#327.2762.9029.792-24#150.5559.8027.042-52#333.8262.9929.882-25#157.0959.7026.962-53#340.3663.0629.962-26#163.6459.6326.902-54#346.9163.1130.012-27#170.1859.5726.862-55#353.4563.1430.042-28#176.7359.5526.84表3-27法距7m處瓦斯排放鉆孔施工參數(shù)表（第3圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m3-1#0.0066.0129.133-26#183.6763.0726.213-2#7.3566.0029.123-27#191.0263.0926.233-3#14.6965.9729.083-28#198.3763.1526.283-4#22.0465.9129.023-29#205.7163.2326.353-5#29.3965.8428.943-30#213.0663.3326.443-6#36.7365.7428.843-31#220.4163.4526.553-7#44.0865.6328.713-32#227.7663.5926.683-8#51.4365.5028.573-33#235.1063.7526.833-9#58.7865.3628.423-34#242.4563.9226.993-10#66.1265.2028.253-35#249.8064.1027.163-11#73.4765.0328.083-36#257.1464.2927.333-12#80.8264.8527.893-37#264.4964.4727.523-13#88.1664.6627.713-38#271.8464.6627.713-14#95.5164.4727.523-39#279.1864.8527.893-15#102.8664.2927.333-40#286.5365.0328.083-16#110.2064.1027.163-41#293.8865.2028.253-17#117.5563.9226.993-42#301.2265.3628.423-18#124.9063.7526.833-43#308.5765.5028.573-19#132.2463.5926.683-44#315.9265.6328.713-20#139.5963.4526.553-45#323.2765.7428.843-21#146.9463.3326.443-46#330.6165.8428.943-22#154.2963.2326.353-47#337.9665.9129.023-23#161.6363.1526.283-48#345.3165.9729.083-24#168.9863.0926.233-49#352.6566.0029.123-25#176.3363.0726.21表3-28法距7m處瓦斯排放鉆孔施工參數(shù)表（第4圈）鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m鉆孔編號(hào)方位角/°傾角/°鉆孔長度/m4-1#0.0069.0528.294-23#184.1966.7525.684-2#8.3769.0428.274-24#192.5666.7825.714-3#16.7469.0028.234-25#200.9366.8325.764-4#25.1268.9528.164-26#209.3066.9125.844-5#33.4968.8728.074-27#217.6767.0125.954-6#41.8668.7827.954-28#226.0567.1326.074-7#50.2368.6727.814-29#234.4267.2726.224-8#58.6068.5427.664-30#242.7967.4226.384-9#66.9868.4027.494-31#251.1667.5826.554-10#75.3568.2427.314-32#259.5367.7426.744-11#83.7268.0827.124-33#267.9167.9126.934-12#92.0967.9126.934-34#276.2868.0827.124-13#100.4767.7426.744-35#284.6568.2427.314-14#108.8467.5826.554-36#293.0268.4027.494-15#117.2167.4226.384-37#301.4068.5427.664-16#125.5867.2726.224-38#309.7768.6727.814-17#133.9567.1326.074-39#318.1468.7827.954-18#142.3367.0125.954-40#326.5168.8728.074-19#150.7066.9125.844-41#334.8868.9528.164-20#159.0766.8325.764-42#343.2669.0028.234-21#167.4466.7825.7