复合关键层综放开采瓦斯运移与抽采耦合规律研究

doi:10.11799/ce202302021

摘要/Abstract

摘要： 针对复合关键层工作面开采后覆岩裂隙演化及瓦斯运移涌出耦合规律，以王家岭煤矿12313综放工作面为工程背景，通过研究工作面推进后覆岩活动、裂隙演化情况，得到工作面覆岩裂隙分布特征，建立数值模型，分析卸压瓦斯运移规律。最终将研究结果应用于12313综放工作面现场瓦斯治理及效果检验。结果表明：12313综放工作面复合关键层初次破断步距为49.84m，走向模型的垮落带和裂隙带组成的“两带”高度为121.1m，切眼侧和工作面一侧的裂隙区宽度分别为45.6m和44.6m，切眼和工作面的垮落角分别为62°和60°，倾向模型的垮落带和裂隙带组成的“两带”高度为115m，运输巷一侧和回风巷一侧的裂隙区宽度分别为37m和40m，运输巷和回风巷的垮落角分别为62°和63°；12313综放工作面施加“高位定向钻孔+回风巷埋管”抽采措施后，回采过程中上隅角最大瓦斯浓度能够保持在安全范围内，当埋管口深度为17.3m时，上隅角瓦斯浓度达到0.478%，有效解决了上隅角瓦斯超限及积聚问题，可为类似条件下采煤工作面瓦斯治理提供参考。

关键词: 复合关键层, 裂隙演化, 瓦斯运移, 上隅角, 瓦斯抽采

Abstract: Abstract:In view of the coupling law of erosion overburden fracture evolution and gas migration and emission after mining in the working face of composite key strata, taking 12313 fully mechanized caving face in Wangjialing Coal Mine as the engineering background, through studying the erosion overburden activity and fracture evolution after working face advancing, the distribution characteristics of erosion overburden fracture in the working face are obtained, and the numerical model is established to analyze the pressure relief gas migration law. Finally, the research results are applied to the field gas control and effect test of 12313 fully mechanized caving face.The results show that the initial breaking distance of composite key strata in 12313 fully mechanized caving face is 49.84m.The height of the “two zones” composed of the caving zone and the fracture zone of the strike model is 121.1m. The widths of the fracture zone on the side of the cut and the working face are 45.6m and 44.6m, respectively. The caving angles of the cut and the working face are 62° and 60°, respectively.The height of the“two zones” of the caving zone and the fracture zone of the dip model is 115m. The width of the fracture zone on the side of the tape channel and the side of the return air channel is 37m and 40m, respectively. The caving angles of the tape channel and the return air channel are 62° and 63°, respectively.The maximum gas concentration in the upper corner of 12313 fully mechanized caving face can be maintained in a safe range after applying high directional drilling and buried pipe drainage measures.When the buried pipe depth is 17.3 m, the gas concentration in the upper corner reaches 0.478 %, which effectively solves the problem of gas overrun and accumulation in the upper corner, and can provide reference for gas control in coal mining face under similar conditions.

中图分类号:

TD712+.6

董国伟, 任小亮, 梁烜铭, 李典成, 白成伟, 安敏鸽. 复合关键层综放开采瓦斯运移与抽采耦合规律研究[J]. 煤炭工程, 2023, 55(2): 116-122.

参考文献

[1]钱鸣高, 缪协兴, 许家林.岩层控制中的关键层理论研究[J]. 煤炭学报, 1996(03): 2-7.
[2]QIANMinggao, MIAOXiexing, XUJialin.Theoretical study of key stratum in ground control[J].Journal of China Coal Society, 1996(03): 2-7.
[3]茅献彪, 缪协兴, 钱鸣高.采动覆岩中关键层的破断规律研究[J]. 中国矿业大学学报, 1998(01): 41-44.
[4]MAOXianbiao, MIAOXiexing, QIANMinggao.Study on broken laws of key strata in mining overlying strata[J]. Journal of China University of Mining and Technology, 1998(01): 41-44.
[5]钱鸣高, 茅献彪, 缪协兴.采场覆岩中关键层上载荷的变化规律[J]. 煤炭学报, 1998(02): 25-29.
[6]QIANMinggao, MAOXianbiao, MIAOXiexing.Variation of loads on the key strata of the overlying strata above the workings[J]. Journal of China Coal Society, 1998(02): 25-29.
[7]茅献彪, 缪协兴, 钱鸣高.采高及复合关键层效应对采场来压步距的影响[J]. 湘潭矿业学院学报, 1999(01): 3-7.
[8]MAO Xianbiao, MIAO Xiexing, QIAN Minggao.Influence of mining height and mixed effect of key strata on broken length of the harden strata[J].Journal of Xiangtan Mining Institute, 1999(01): 3-7.
[9]茅献彪, 缪协兴, 钱鸣高.采动覆岩中复合关键层的断裂跨距计算[J]. 岩土力学, 1999(02): 1-4.
[10]MAO Xianbiao, MIAO Xiexing, QIAN Minggao.Calculation for fracture span of conpoundkey strata in mining rocks[J]. Rock and Soil Mechanics, 1999(02): 1-4.
[11]缪协兴, 茅献彪, 钱鸣高.采动覆岩中关键层的复合效应分析[J]. 矿山压力与顶板管理, 1999(Z1): 19-21+25-238.
[12]MIAO Xiexing, MAO Xianbiao, QIAN Minggao.Compound effect analysis of key strata in mining-induced overburden[J]. Journal of Mining & Safety Engineering, 1999(Z1): 19-21+25-238.
[13]缪协兴, 茅献彪, 孙振武, 等.采场覆岩中复合关键层的形成条件与判别方法[J]. 中国矿业大学学报, 2005(05): 547-550.
[14]MIAO Xiexing, MAO Xianbiao, SUN Zhenwu, et al.Formation conditions of compound key stratain mining overlayer strata and its discriminance[J]. Journal of China University of Mining and Technology, 2005(05): 547-550.
[15]孙振武, 缪协兴, 茅献彪.采场覆岩复合关键层的判别条件[J]. 矿山压力与顶板管理, 2005(04): 76-77+83.
[16]SUN Zhenwu, MIAO Xiexing, MAO Xianbiao.Discriminant condition of compound key strata of overburden in stope[J]. Journal of Mining & Safety Engineering, 2005(04): 76-77+83.
[17]王海洋.复合坚硬顶板变形破断特征及对矿压显现的影响规律[D]. 重庆大学, 2017.
[18]林泽江.大采高坚硬顶板工作面矿压显现规律研究[J]. 当代化工研究, 2019(03): 65-66.
[19]LIN Zejiang.Study on regularity of strata behavior in large mining top hard roof working face[J]. modern chemical research, 2019(03): 65-66.
[20]曹卫军.特厚煤层综放复合关键层顶板运动规律研究[J].能源技术与管理, 2019, 44(05):67-69
[21]CAO Weijun.Study on roof movement law of composite key stratum in fully mechanized caving of extra-thick coal seam[J].Energy Technology and Management, 2019, 44(05):67-69
[22]林海飞, 李树刚, 成连华, 等.覆岩采动裂隙演化形态的相似材料模拟实验[J].西安科技大学学报, 2010, 30(05):507-512
[23]LIN Haifei, LI Shugang, CHENG Lianhua, et al.Model experiment of evolution pattern of mining-induced fissure in overlying strata[J].Journal of Xi' an University of Science and Technology, 2010, 30(05):507-512
[24]李树刚, 徐培耘, 赵鹏翔, 等.综采工作面覆岩压实区演化采高效应分析及应用[J].煤炭学报, 2018, 43(S1):112-120
[25]LI Shugang, XU Peiyun, ZHAO Pengxiang, et al.Analysis and application on the mining height effect of evolving law of compaction area at fully mechanized face[J].Journal of China Coal Society, 2018, 43(S1):112-120
[26]赵鹏翔, 卓日升, 李树刚, 等.综采工作面瓦斯运移优势通道演化规律采高效应研究[J].采矿与安全工程学报, 2019, 36(04):848-856
[27]ZHAO Pengxiang, ZHUO Risheng, LI Shugang, et al.Study on the mining height evolution law of the dominant channel of gas migration in fully mechanized mining face[J].Journal of Mining & Safety Engineering, 2019, 36(04):848-856
[28]魏宗勇, 李树刚, 林海飞, 等.大采高综采覆岩裂隙演化特征三维实验研究[J].西安科技大学学报, 2020, 40(04):589-598
[29]WEIZongyong, LIShugang, LINHaifei, et al.Three-dimensional experimental study on evolution characteristics of overburden fractures in fully mechanized mining with large mining height[J].Journal of Xi’an University of Science and Technology, 2020, 40(04):589-598
[30]白建平, 郝春生, 杨昌永, 等.新景矿综采面覆岩采动裂隙三维分布规律研究[J].煤炭科学技术, 2020, 48(11):106-112
[31]BAI Jianping, HAO Chunsheng, YANG Changyong, et al.Study on the 3D distribution law of overlying rock cracks in fullymechanized mining face of Xinjing coal mine[J].Coal Science and Technology, 2020, 48(11):106-112
[32]Shixiong Hu, Xiao Liu, Xianzhong Li.Fluid-solid coupling model and simulation of gas-bearing coal for energy security and sustainability[J]. Processes, 2020, 8(2).
[33]康建宏, 邬锦华, 李绪明, 等.采空区高抽巷及埋管抽采下瓦斯分布规律研究[J].采矿与安全工程学报, 2021, 38(01):191-198
[34]KANGJianhong, WU Jinhua, LIXuming, et al.Gas distribution in goaf with high drainage roadway and buried pipe drainage[J].Journal of Mining & Safety Engineering, 2021, 38(01):191-198