神东矿区近距离煤层出一侧采空煤柱压架机制

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摘要针对神东矿区石圪台煤矿1-2煤一盘区多个工作面在推出上覆1-2上煤一侧采空煤柱过程中发生的压架事故，采用现场实测、理论分析和模拟试验，对压架发生的机制及其防治对策进行研究。结果表明：下煤层切眼布置于上覆煤柱区下方，造成工作面回采期间经历由煤柱区进入采空区下的开采过程，即为出一侧采空煤柱的开采。在此过程中出现的压架存在2种类型，当切眼距煤柱边界较远而大于煤柱上方关键层的初次破断距时，则出煤柱时该关键层将处于周期破断状态，并与煤柱边界采空区一侧已断块体形成非稳定的三铰式结构，该结构的相对回转运动传递的过大载荷是压架发生的根本原因。当切眼距煤柱边界较近而介于煤柱上方关键层的初次破断距和周期破断距之间时，则出煤柱时该关键层将呈现悬臂式破断，由于其破断跨度较大，将造成支架载荷的过大而压架；同时，若此破断跨度超过该关键层1.7～1.9倍的周期破断距时，其压架强度将明显增高。模拟试验和工程实践表明，缩小下煤层切眼距煤柱边界的距离使得煤柱上方关键层不发生破断，可有效防治出一侧采空煤柱开采的压架。

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关键词 ：采矿工程, 近距离煤层, 一侧采空煤柱, 压架, 关键层

Abstract：Aiming at the support crushing accidents during the faces mining out of the upper 1-2 goaf-side coal pillar in panel of coal seam 1-2 of Shigetai coal mine，the mechanism and its prevention measures are researched based on the field measurement，simulation experiments and theoretical analysis. The results show that when the cut-hole of the lower seam was set under the upper coal pillar，the working face would go through the mining stage from the area under the coal pillar to that under the goaf，which was called the mining out of the upper goaf-side coal pillar. In the mining process，two situations exist in the support crushing by the influence of the cut-hole position. If the distance between the cut-hole and the upper coal pillar boundary is larger than the first breaking step of the key stratum(KS) above the pillar，the periodic breaking block of the KS and its broken block at the side of goaf near the pillar boundary will form an unstable three hinged structure when mining out of the pillar；and the excessive load caused by the relative rotary motion of the structure is the fundamental source for the support crushing. If the distance is between the first breaking and periodic breaking step of the KS，the KS will present the cantilevered breaking state when mining out of the pillar；and the support crushing is caused by the excessive load due to its long breaking span. Meanwhile，when the KS breaking span is more than 1.7–1.9 times the length of its periodic broken step，the risk level of the support crushing will be obviously higher than that in the former situation. The simulation experiments and engineering practices show that the support crushing accident during the mining out of the upper goaf-side coal pillar can be effectively controlled by reducing the distance between the cut-hole and coal pillar boundary，so as to prevent the breaking of the KS above the pillar.

Key words： mining engineering close distance seam goaf-side coal pillar support crushing key stratum(KS)

收稿日期: 2012-10-08

引用本文:

鞠金峰1，许家林2，3，朱卫兵2，3，王路军2，3. 神东矿区近距离煤层出一侧采空煤柱压架机制[J]. 岩石力学与工程学报, 2013, 32(7): 1321-1330.
JU Jinfeng1，XU Jialin2，3，ZHU Weibing2，3，WANG Lujun2，3. MECHANISM OF SUPPORT CRUSHING WHILE MINING OUT OF UPPER GOAF-SIDE COAL PILLAR IN CLOSE DISTANCE SEAMS OF SHENDONG MINING AREA. , 2013, 32(7): 1321-1330.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/I7/1321

[1]	张斌，刘青华，张建铭，等. 神东矿区千万吨矿井群设备管理模式研究[J]. 煤炭学报，2010，35(11)：1 939-1 944.(ZHANG Bin，LIU Qinghua，ZHANG Jianming，et al. Equipment management mode of coal mine group with annual production over 10 Mt per each mine in Shendong mining area[J]. Journal of China Coal Society，2010，35(11)：1 939-1 944.(in Chinese)) " target="_blank">
[2]	王国旺. 活鸡兔井工作面矿压规律及安全措施[J]. 陕西煤炭，2007，(1)：53-54.(WANG Guowang. Strata behavior and safety measure of working face in Huojitu coal mine[J]. Shaanxi Coal，2007，(1)：53-54.(in Chinese)) " target="_blank">
[3]	鞠金峰，许家林，朱卫兵，等. 近距离煤层工作面出倾向煤柱动载矿压机制研究[J]. 煤炭学报，2010，35(1)：15-20.(JU Jinfeng，XU Jialin，ZHU Weibing，et al. Mechanism of strong strata behaviors during the working face out of the upper dip coal pillar in contiguous seams[J]. Journal of China Coal Society，2010，35(1)：15-20.(in Chinese))
[4]	鞠金峰，许家林，朱卫兵，等. 近距离煤层采场过上覆T形煤柱矿压显现规律[J]. 煤炭科学技术，2010，38(10)：5-8.(JU Jinfeng，XU Jialin，ZHU Weibing，et al. Strata behavior law of coal mining face with short distance to above seam passing through upper seam T crossing coal pillar[J]. Coal Science and Technology，2010，38(10)：5-8.(in Chinese))
[5]	鞠金峰，许家林，朱卫兵，等. 大柳塔煤矿22103综采面压架机制及防治技术[J]. 煤炭科学技术，2012，40(2)：4-7.(JU Jinfeng，XU Jialin，ZHU Weibing，et al. Hydraulic powered support jammed mechanism and prevention technology of fully mechanized coal mining face 22103 in Daliuta mine[J]. Coal Science and Technology，2012，40(2)：4-7.(in Chinese))
[6]	鞠金峰，许家林. 倾向煤柱边界超前失稳对工作面出煤柱动载矿压的影响[J]. 煤炭学报，2012，37(7)：1 080-1 087.(JU Jinfeng，XU Jialin. Influence of leading instability in the upper dip coal pillar boundary to the strong strata behaviors while mining out of the pillar[J]. Journal of China Coal Society，2012，37(7)：1 080-1 087. (in Chinese)) " target="_blank">
[7]	许家林，钱鸣高. 覆岩关键层位置的判别方法[J]. 中国矿业大学学报，2000，29(5)：463-467.(XU Jialin，QIAN Minggao. Method to distinguish key layer of overburden strata[J]. Journal of China University of Mining and Technology，2000，29(5)：463-467.(in Chinese)) " target="_blank">
[8]	钱鸣高，缪协兴，许家林，等. 岩层控制的关键层理论[M]. 徐州：中国矿业大学出版社，2003：10-42.(QIAN Minggao，MIAO Xiexing，XU Jialin，et al. Study of key strata theory in ground control[M]. Xuzhou：China University of Mining and Technology Press，2003：10-42.(in Chinese)) " target="_blank">
[9]	许家林，朱卫兵，王晓振，等. 浅埋煤层覆岩关键层结构分类[J]. 煤炭学报，2009，34(7)：865-870.(XU Jialin，ZHU Weibing，WANG Xiaozhen，et al. Classification of key strata structure of overlying strata in shallow coal seam[J]. Journal of China Coal Society，2009，34(7)：865-870.(in Chinese))
[10]	钱鸣高，缪协兴，何富连. 采场“砌体梁”结构的关键块分析[J]. 煤炭学报，1994，19(6)：557-563.(QIAN Minggao，MIAO Xiexing，HE Fulian. Analysis of key block in the structure of voussoir beam in long wall mining[J]. Journal of China Coal Society，1994，19(6)：557-563.(in Chinese)) " target="_blank">
[11]	钱鸣高，石平五，许家林. 矿山压力与岩层控制[M]. 徐州：中国矿业大学出版社，2010：84-90.(QIAN Minggao，SHI Pingwu，XU Jialin. Ground pressure and strata control[M]. Xuzhou：China University of Mining and Technology Press，2010：84-90.(in Chinese)) " target="_blank">
[12]	许家林，鞠金峰. 特大采高综采面关键层结构形态及其对矿压显现的影响[J]. 岩石力学与工程学报，2011，30(8)：1 547-1 556.(XU Jialin，JU Jinfeng. Key strata structural morphology and its influence on strata behavior in fully-mechanized face with super great mining height[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(8)：1 547-1 556.(in Chinese)) " target="_blank">
[13]	鞠金峰，许家林，王庆雄. 大采高采场关键层“悬臂梁”结构运动型式及对矿压的影响[J]. 煤炭学报，2011，36(12)：2 115-2 120. (JU Jinfeng，XU Jialin，WANG Qingxiong. Cantilever structure moving type of key strata and its influence on ground pressure in large mining height workface[J]. Journal of China Coal Society，2011，36(12)：2 115-2 120.(in Chinese)) " target="_blank">
[14]	云天宝，宋琳，徐会军. 神华集团多元化发展模式研究[J]. 中国煤炭，2011，37(6)：24-26.(YUN Tinabao，SONG Lin，XU Huijun. Mode of business diversification of Shenhua Group[J]. China Coal，2011，37(6)：24-26.(in Chinese)) " target="_blank">
[15]	李鸿昌. 矿山压力的相似模拟试验[M]. 徐州：中国矿业大学出版社，1988：93-95.(LI Hongchang. Similar simulation experiment in ground pressure[M]. Xuzhou：China University of Mining and Technology Press，1988：93-95.(in Chinese)) " target="_blank">
[16]	吴钰应，王世远，关玉顺，等. 相似材料配比研究[J]. 阜新矿业学院学报，1981，(1)：32-49.(WU Yuying，WANG Shiyuan，GUAN Yushun，et al. A study of the proportion of mixture of similar materials[J]. Journal of Fuxin Mining Institute，1981，(1)：32-49.(in Chinese)) " target="_blank">