屯兰煤矿厚煤层沿空留巷充填体上方顶板稳定性控制研究
Study on roof control above backfilling area for gob-side entry retaining in 22301 workface of Tunlan Coal Mine
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摘要: 充填体上方顶板的稳定性是影响沿空留巷效果的关键因素，针对屯兰矿22301大采高工作面留巷顶板离层的控制难题，通过分析留巷期间各阶段顶板受力特征和顶板离层机理，建立充填体上方顶板离层力学模型，提出了厚煤层沿空留巷充填体上方直接顶板的分区动态加固控制技术：“锚网索”+“高预应力锚网索”+“高阻力液压支柱”留巷分阶段支护。现场试验结果表明：顶板最大下沉量为140 mm，底鼓量为660 mm；工作面后方150 m外，0～6 m累计离层量为16 mm、0～2.5 m累计离层量为14 mm；围岩变形以底鼓为主，采用分区域动态支护加固顶板控制技术使顶板整体稳定性得到明显提升。Abstract: The stability of the roof above the filling body is a key factor affecting the effect of gob-side entry retaining. In view of the problem of roof separation control of gob-side entry retaining at 22301 working face with large mining height in Tunlan Coal Mine, by analyzing the stress characteristics and roof separation mechanism of each stage during the roadway retaining, the mechanical model of roof separation above the filling body was established, the partition dynamic reinforcement control technology of the straight roof above the gob-side entry retaining filling body in thick coal seam was proposed, that is “anchor cable”+ “high pre-stressed anchor cable”+ “high resistance hydraulic prop” stage support for the entry retaining. The field test results show that the maximum subsidence of the roof is 140 mm, and the floor heave is 660 mm. Outside the 150 m behind the working face, the cumulative separation of 0 m to 6 m is 16 mm, and the cumulative separation of 0 m to 2.5 m is 14 mm. The surrounding rock deformation is dominated by floor heave. The overall stability of the roof supported by sub-regional dynamic support reinforcement technology is significantly improved.
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[1] 陈勇，柏建彪，王襄禹，等．沿空留巷巷内支护技术研究与应用[J]．煤炭学报，2012，37（6）：903－910. CHEN Yong, BAI Jianbiao, WANG Xiangyu, et al. Support technology research and application inside roadway of gob-side entry retaining[J]. Journal of China Coal Society, 2012, 37（6）: 903-910.
[2] 康红普，牛多龙，张镇，等．深部沿空留巷围岩变形特征与支护技术[J]．岩石力学与工程学报，2010，29（10）：1977－1987. KANG Hongpu, NIU Duolong, ZHANG Zhen, et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29（10）: 1977-1987.
[3] 张农，韩昌良，阚甲广，等．沿空留巷围岩控制理论与实践[J]．煤炭学报，2014，39（8）：1635－1641. ZHANG Nong, HAN Changliang, KAN Jiaguang, et al. Theory and practice of surrounding rock control for pillarless gob-side entry retaining[J]. Journal of China Coal Society, 2014, 39（8）: 1635-1641.
[4] 阚甲广，袁亮，张农，等．留巷充填区域顶板承载性能研究[J]．煤炭学报，2011，36（9）：1429－1434. KAN Jiaguang, YUAN Liang, ZHANG Nong, et al. Bearing capacity of backfilling area roof in gob-side entry retaining[J]. Journal of China Coal Society, 2011, 36（9）: 1429-1434.
[5] 郑西贵，白云勃．深井沿空留巷充填区顶板支护技术[J]．煤矿开采，2012，17（3）：42－45. ZHENG Xigui, BAI Yunbo. Technology of roof supporting at stowing area in deep roadway retained along gob[J]. Coal Mining Technology, 2012, 17（3）: 42-45.
[6] 陈上元，赵波，袁越，等．城郊矿深部工作面切顶留巷工程试验研究[J]．采矿与安全工程学报，2021，38（1）：121－129. CHEN Shangyuan, ZHAO Bo, YUAN Yue, et al. Engineering experiment on gob-side entry retaining by roof cutting of deep mining face in Chengjiao coalmine[J]. Journal of Mining & Safety Engineering, 2021, 38（1）: 121-129.
[7] 何满潮，陈上元，杨军，等．切顶卸压沿空留巷围岩结构控制及其工程应用[J]．中国矿业大学学报，2017， 46（5）：959－969. HE Manchao, CHEN Shangyuan, YANG Jun, et al. Control of surrounding rock structure for gob-side entry retaining by cutting roof to release pressure and its engineering application[J]. Journal of China University of Mining & Technology, 2017, 46（5）: 959-969.
[8] 柏建彪，周华强，侯朝炯，等．沿空留巷巷旁支护技术的发展[J]．中国矿业大学学报，2004，33（2）：183. BAI Jianbiao, ZHOU Huaqiang, HOU Chaojiong et al. Development of support technology beside roadway in goaf-side entry retaining for next sublevel[J]. Journalof China University of Mining & Technology, 2004, 33（2）: 183-186.
[9] 陈勇，柏建彪，朱涛垒，等．沿空留巷巷旁支护体作用机制及工程应用[J]．岩土力学，2012，33（5）：1427. CHEN Yong, BAI Jianbiao, ZHU Taolie, et al. Mechanisms of roadside support in gob-side entry retaining and its application[J]. Rock and Soil Mechanics, 2012, 33（5）: 1427.
[10] 柏建彪，侯朝炯，杜木民，等．复合顶板极软煤层巷道锚杆支护技术研究[J]．岩石力学与工程学报，2001， 20（1）：53－56. BAI Jianbiao, HOU Chaojiong, DU Mumin, et al. On bolting support of roadway in extremely soft seam of coal mine with complex roof[J]. Chinese Journal of Rock Mechanics and Engineering, 2001, 20（1）: 53-56.
[11] 卞卡，柏建彪，赵涛，等．综采工作面高水材料空巷充填技术与应用[J]．煤炭技术，2021，40（5）：37－40. BING Ka, BAI Jianbiao, ZHAO Tao, et al. Technology and application of filling abandoned roadway with high water material in fully-mechanized working face[J]. Coal Technology, 2021, 40（5）: 37-40.
[12] 张耀辉，李西凡，熊祖强，等．厚煤层综采工作面空巷综合治理技术[J]．中国安全科学学报，2020，30（6）：71－77. ZHANG Yaohui, LI Xifan, XIONG Zuqiang, et al. Comprehensive governance technology for fully-mechanized mining face across abandoned roadways in thick coal seam[J]. China Safety Science Journal, 2020, 30（6）: 71-77.
[13] 任硕，周逸群，王鹏飞，等．软弱夹层复合顶板动压巷道支护技术研究[J]．煤炭技术，2021，40（8）：32－36. REN Shuo, ZHOU Yiqun, WANG Pengfei, et al. Study on support technology of dynamic pressure roadway support in soft and weak interlayer composite roof[J]. Coal Technology, 2021, 40（8）: 32-36.
[14] 付玉凯，王涛，孙志勇，等．复合软岩巷道长短锚索层次控制技术及实践[J]．采矿与安全工程学报，2021， 38（2）：237－245. FU Yukai, WANG Tao, SUN Zhiyong, et al. Layered control technology and practice of long and short anchor cable in composite soft rock roadway[J]. Journal of Mining & Safety Engineering, 2021, 38（2）: 237-245.
[15] 韩昌良，张农，李桂臣，等．覆岩分次垮落时留巷顶板离层形成机制[J]．中国矿业大学学报，2012，41（6）：893－899. HAN Changliang, ZHANG Nong, LI Guichen et al. Bed separation mechanism under sequential roof collapse condition in a gob-side entry retaining[J]. Journal of China University of Mining & Technology, 2012, 41（6）: 893-899.
[16] 唐建新，邓月华，涂兴东，等．锚网索联合支护沿空留巷顶板离层分析[J]．煤炭学报，2010，35（11）：1827. TANG Jianxin, DENG Yuehua, TU Xingdong, et al. Analysis of roof separation in gob-side entry retaining combined support with bolting wire mesh[J]. Journal of China Coal Society, 2010, 35（11）: 1827-1831.
[17] 李迎富，华心祝，蔡瑞春．沿空留巷关键块的稳定性力学分析及工程应用[J]．采矿与安全工程学报，2012，29（3）：357. LI Yingfu, HUA Xinzhu, CAI Ruihua, et al. Mechanics analysis on the stability of key block in the gob-side entry retaining and engineering application[J]. Journal of Mining & Safety Engineering, 2012, 29（3）: 357.
[18] 郭育光，柏建彪，侯朝炯．沿空留巷巷旁充填体主要参数研究[J]．中国矿业大学学报，1992，21（4）：4. GUO Yuguang, BAI Jianbiao, HOU Chaojiong. Study on the main parameters of gateside packs in gateways maintained along gob-edges[J]. Journal of China University of Mining & Technology, 1992, 21（4）: 4-14.
[19] 张自政，柏建彪，王卫军，等．沿空留巷充填区域直接顶受力状态探讨与应用[J]．煤炭学报，2017，42（8）：1960－1970. ZHANG Zizheng, BAI Jianbiao, WANG Weijun, et al. Study on stress state of immediate roof above backfill area in gob-side entry retaining and its application[J]. Journal of China Coal Society, 2017, 42（8）: 1960.
[20] 张自政，柏建彪，王卫军，等．沿空留巷充填区域锚索锚固区内外顶板离层力学分析与工程应用[J]．采矿与安全工程学报，2018，35（5）：893. ZHANG Zizheng, BAI Jianbiao, WANG Weijun, et al. Mechanical analysis of roof separation within and outside anchorage zone above backfill area of gob-side entry retaining and its engineering application[J]. Journal of Mining & Safety Engineering, 2018, 35（5）: 893.
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