斜交煤柱叠加影响下工作面应力场分布特征研究
Study on evolution law of working face stress field under influence of oblique crossing coal pillars superposition
-
摘要: 针对近距离煤层群工作面受上方多层采空区斜交煤柱叠加影响造成采场顶板垮落、煤壁片帮和压架等问题，以沙坪矿9309工作面为工程背景，在实验室测试煤岩体基本力学参数的基础上，利用数值模拟和理论分析等方法对斜交叠加煤柱影响下工作面应力场的分布特征进行研究。研究表明：叠加煤柱造成其下方9309工作面在未开采时就处于较高集中应力状态，集中系数为2.3；受煤柱影响，工作面前方最大超前支承应力的距离随推进距离的增加而逐渐减小；工作面处于煤柱下方时，煤柱集中应力因采动影响而逐渐降低和转移，工作面前方12 m左右范围内集中应力却逐渐增加，当回采稳定后，工作面顶板受叠加煤柱影响的范围为工作面长度的72%，煤柱叠加区应力普遍在25 MPa左右，集中系数6.0左右；遗留煤柱尺寸越大，其集中应力在底板中的传播距离越远，影响范围越广，工作面顶板集中应力越大。Abstract: In view of the problems in roof collapse, coal wall spalling and support crushing caused by the superposition of inclined crossing coal pillars in the upper multi-layer goaf in the working face of the close coal seam group, this paper takes 9309 working face of Shaping Mine as the engineering background, and based on the laboratory testing of the basic mechanical parameters of coal and rock mass, numerical simulation and theoretical analysis are used to study the distribution characteristics of working face stress field under the influence of oblique superimposed coal pillar. The results show that 9309 working face under the superimposed coal pillar is in a high concentrated stress state before mining, and the concentration coefficient is 2.3. Under the influence of coal pillar, the distance of maximum advance supporting stress in front of working face decreases gradually with the increase of advance distance. When the working face is under the coal pillar, the concentrated stress of the coal pillar gradually decreases and shifts due to the influence of mining, but it gradually increases in the range of about 12 m in front of the working face. When the stoping is stable, the influence range of the working face roof by superimposed coal pillar is 72% of the working face length, the stress of the superimposed coal pillar area is generally about 25 MPa, and the concentration coefficient is about 6.0. The larger the size of the remaining coal pillar, the farther the concentrated stress propagates in the floor, the wider the influence range, and the greater the concentrated stress in the roof of the working face.
-
-
[1] 屠洪盛，屠世浩，袁永，等．厚煤层刀柱采空区集中应力影响范围理论判据研究[J]．煤炭学报，2013，38（8）：1345－1351. TU Hongsheng, TU Shihao, YUAN Yong, et al. Theoretical criterion of concentrated stress influence scope with thick coal seam left-over goaf[J]. Journal of China Coal Society, 2013, 38（8）: 1345-1351.
[2] 白庆升，屠世浩，王方田，等．浅埋近距离房式煤柱下采动应力演化及致灾机制[J]．岩石力学与工程学报，2012，31（Ｓ2）：3772－3778. BAI Qingsheng, TU Shihao, WANG Fangtian, et al. Stress evolution and induced accidents mechanism in shallow coal seam in proximity underlying the room mining residual pillars[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31（S2）: 3772-3778.
[3] 朱德福，屠世浩，屠洪盛，等．冲沟地貌间隔式煤柱下采动应力传播规律研究[J]．采矿与安全工程学报，2018， 35（4）：701－707. ZHU Defu, TU Shihao, TU Hongsheng, et al. Analysis of stress propagation mechanism in the interval coal pillars under the gully landform[J]. Journal of Mining & Safety Engineering, 2018, 35（4）: 701-707.
[4] 褚福延，吴爱军，南玮．上覆煤柱影响下工作面应力场分布变化规律[J]．中国矿业，2021，30（6）：127－132. CHU Fuyan, WU Aijun, NAN Wei. Variation rule of stress field distribution at working face under the overlying coal pillar[J]. China Mining Magazine, 2021, 30（6）: 127-132.
[5] 岳喜占，涂敏，李迎富，等．近距离煤层开采遗留边界煤柱下底板巷道采动附加应力计算[J]．采矿与安全工程学报，2021，38（2）：246－252. YUE Xizhan, TU Min, LI Yingfu, et al. Calculation of subsidiary mining stress in floor roadway under the remaining boundary pillar of close coal seam mining[J]. Journal of Mining & Safety Engineering, 2021, 38（2）: 246-252.
[6] 李胜，周利峰，罗明坤，等．煤层群下行开采煤柱应力传递规律[J]．辽宁工程技术大学学报（自然科学版），2015，34（6）：661-667. LI Sheng, ZHOU Lifeng, LUO Mingkun, et al. Strata behaviors analysis of stage coal pillar in Tong Xin mine caused by repeated mining[J]. Journal of Liaoning Technical University（Natural Science）, 2015, 34（6）: 661-667.
[7] 屠世浩，王方田，窦凤金，等．上层煤柱下综放沿空回采巷道矿压规律研究[J]．中国矿业大学学报，2010， 39（1）：1－5. TU Shihao, WANG Fangtian, DOU Fengjin, et al. Fully mechanized top-coal caving: underground stress at gateways under barrier pillars of an upper coal seam[J]. Journal of China University of Mining & Technology, 2010, 39（1）: 1-5.
[8] 于斌，刘长友，杨敬轩，等．大同矿区双系煤层开采煤柱影响下的强矿压显现机理[J]．煤炭学报，2014，39（1）：40-46. YU Bin, LIU Changyou, YANG Jingxuan, et al. Mechanism of strong pressure reveal under the influence of mining dual system of coal pillar in Datong mining area[J]. Journal of China Coal Society, 2014, 39（1）: 40-46.
[9] 梁东辉，张宏凯，刘超，等．遗留煤柱下四面临空孤岛工作面矿压显现规律研究[J].煤炭科技，2021，42（2）：122－125. LIANG Donghui, ZHANG Hongkai, LIU Chao, et al. Research on the law of the rock pressure behavior of the working faces facing the empty island under the left coal pillar[J]. Coal Science & Technology Magazine, 2021, 42（2）: 122-125.
[10] 冀国飞．近距离煤柱下工作面矿压规律及支架选型研究[J]．煤，2021，30（11）：46－47. JI Guofei. Study on mining pressure law and support selection of working face under short distance coal pillar[J]. Coal, 2021, 30（11）: 46-47.
[11] 刘迅，纪欣卓，苗凯军．深部充填沿空巷道护巷煤（岩）体受力特征及稳定性分析[J]．采矿与安全工程学报，2020，37（1）：32－39. LIU Xun, JI Xinzhuo, MIAO Kaijun, et al. Stress characteristics and stability analysis of coal （rock） body in deep back-filling gob side entry[J]. Journal of Mining & Safety Engineering, 2020, 37（1）: 32-39.
[12] 唐龙，刘迅，屠洪盛，等．采动影响下大倾角复合顶板工作面矿压规律研究[J]．煤炭科学技术，2022， 50（11）：58-66. TANG Long, LIU Xun, TU Hongsheng, et al. Study on strata pressure behavior law of composite roof working face with large dip angle under mining influence[J]. Coal Science and Technology, 2022, 50（11）: 58-66.
[13] 刘永红，李康，曹民远，等．煤柱下开切巷应力分布分析及治理研究[J]．煤炭工程，2020，52（9）：47－51. LIU Yonghong, LI Kang, CAO Minyuan, et al. Analysis of stress distribution under the coal pillar of open cut lane and its control countermeasures[J]. Coal Engineering, 2020, 52（9）: 47-51.
[14] 商和福，宁建国，杨尚，等．近距离煤层不规则遗留煤柱下回采巷道围岩稳定性研究[J]．煤矿安全，2019， 50（5）：273－276. SHANG Hefu, NING Jianguo, YANG Shang, et al. Study on surrounding rock stability of mining roadway under irregular coal pillar of close distance coal seams[J]. Safety in Coal Mines, 2019, 50（5）: 273-276.
[15] 马宁，张臣，贾江锋，等．上分层遗留煤柱影响下工作面安全回采研究[J]．煤矿安全，2019，50（12）：192. MA Ning, ZHANG Chen, JIA Jiangfeng, et al. Study on safe mining of working face under the influence of upper stratified coal pillar[J]. Safety in Coal Mines, 2019, 50（12）: 192-196.
[16] 赵维生，梁维，金志远，等．遗留煤柱下伏近距煤层巷道布置及围岩稳定性[J]．煤矿安全，2017，48（7）：40－43. ZHAO Weisheng, LIANG Wei, JIN Zhiyuan, et al. Stability of surrounding rock and roadway layout in close coal seam underlying residual coal pillar[J]. Safety in Coal Mines, 2017, 48（7）: 40-43.
[17] 刘霞，翟春佳，李常浩．上煤层遗留煤柱影响段沿空掘巷围岩破坏特征及补强支护措施[J]．矿业安全与环保，2021，48（1）：101－107. LIU Xia, ZHAI Chunjia, LI Changhao. Failure characteristics and reinforcement support of surrounding rock in gob-side entry driving affected by residual coal pillar of upper coal seam[J]. Mining Safety & Environmental Protection, 2021, 48（1）: 101-107.
[18] 齐大洪．莒山煤矿遗留煤柱下伏巷道围岩控制技术研究[D]．徐州：中国矿业大学，2019. [19] 唐晓明．采空区遗留煤柱下工作面回采冲击矿压防治技术研究[D]．徐州：中国矿业大学，2020. [20] 孙刘伟，秦子晗，韩凉．上覆遗留煤柱区冲击地压综合防控技术[J]．煤矿安全，2019，50（7）：201－204. SUN Liuwei, QIN Zihan, HAN Liang. Comprehensive prevention technology of rock burst in overlying retained coal pillar area[J]. Safety in Coal Mines, 2019, 50（7）: 201-204.
-
期刊类型引用(6)
1. 韩瑞达. 基于GIS与AHP的煤层顶板涌(突)水危险性研究. 地质装备. 2025(01): 25-32 . 
百度学术
2. 董绪峰. 承压水上含陷落柱构造煤层底板渗流路径研究. 煤炭科技. 2025(01): 105-109 . 百度学术
3. 魏启明，赵宝峰，马进勇，张泽源，马志贤. 煤层底板砂岩含水层水文地质特征的分布式放水试验探查研究. 中国煤炭. 2024(05): 32-39 . 百度学术
4. 刘艳冬，刘滢，卢兰萍，白峰青，王铁记，卫皓皓. 基于ZOA-CNN-GRU模型的煤层底板突水等级预测. 中国煤炭. 2024(06): 44-51 . 百度学术
5. 杨茹蕙，李小萌，王铁记. 基于IAHP-EWM博弈论的煤层底板突水影响因素研究. 煤炭与化工. 2024(07): 43-47+52 . 百度学术
6. 安律宁，陈继福，董广铭，李玉兵. 基于层次聚类模糊综合评判的矿井突水危险性评价. 煤炭与化工. 2023(10): 49-56 . 百度学术
其他类型引用(2)
计量
- 文章访问数: 25
- HTML全文浏览量: 0
- PDF下载量: 22
- 被引次数: 8
下载:
