浅埋深中厚煤层综采工作面支护强度研究
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摘要
结合理论研究和工程借鉴方法,针对浅埋深中厚煤层综采工作面支护强度的确定,进行了了浅埋中厚煤层条件下综采工作面的液压支架选型,并通过现场矿压实测,得出了矿山压力的显现规律。研究表明:综采工作面最大和最小周期来压步距分别为13.89 m与9.84 m,平均约为11.5 m,在周期来压的过程中,工作面中部来压特征较为明显,影响距离3～4 m。工作面液压支架的平均初始支撑力可达到额定初始支撑力的80%,基本满足设计的要求。研究成果可为类似条件工作面安全高效开采提供了参考。
Aiming at the selection of mining equipment for medium-thickness coal seam under conventional mining conditions, the hydraulic support selection of working face under the condition of shallow buried medium-thickness coal seam is determined by combining theoretical calculation with engineering analogy.At the same time, the law of mine pressure behavior is analyzed by measuring the field mine pressure.The results show that the minimum step distance of periodic pressure in working face is 9.84 m, the maximum is 13.89 m, and the average is about 11.5 m. The characteristic of periodic pressure in the middle of the working face is obvious, and the influence distance is 3～4 m.The average initial support forcecan accounts for about 80 percent of the rated initial bracing force, which can meet the design requirements. The research results provide useful reference for safe mining of similar working face.
Aiming at the selection of mining equipment for medium-thickness coal seam under conventional mining conditions, the hydraulic support selection of working face under the condition of shallow buried medium-thickness coal seam is determined by combining theoretical calculation with engineering analogy.At the same time, the law of mine pressure behavior is analyzed by measuring the field mine pressure.The results show that the minimum step distance of periodic pressure in working face is 9.84 m, the maximum is 13.89 m, and the average is about 11.5 m. The characteristic of periodic pressure in the middle of the working face is obvious, and the influence distance is 3～4 m.The average initial support forcecan accounts for about 80 percent of the rated initial bracing force, which can meet the design requirements. The research results provide useful reference for safe mining of similar working face.
引文
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[2] 汪腾蛟,刘建宇.补连塔煤矿12煤四盘区综采工作面矿压显现规律[J].煤矿安全,2018,49(S1):1-4.
[3] 陈永锋,郭瑞瑞,刘玉磊.布尔台煤矿综放工作面矿压显现规律[J].煤矿安全,2018,49(S1):99-101.
[4] 王生彪,黄庆享.浅埋煤层400m超长综采工作面矿压规律研究[J].煤炭科学技术,2018,46(S1):75-80.
[5] 孟龙,高召宁.近距煤层综采工作面矿压显现规律[J].煤矿安全,2014,45(8):64-67.
[6] 张世青,赵健健,刘金凯,等.浅埋深薄基岩中厚煤层矿压显现规律[J].煤矿安全,2014,45(7):192-194+197.
[7] 柴敬,郝雷,姚纪凯,刘文岗.近浅埋煤层综采工作面矿压规律试验研究[J].煤矿安全,2014,45(1):40-43.
[8] 孙璐璐,秦世通,屠洪盛,李智勇.坚硬直接顶首采工作面矿压显现规律分析[J].煤矿安全,2011,42(11):123-125.
[9] 黄庆享.浅埋煤层长壁开采顶板结构及岩层控制研究[M].徐州:中国矿业大学出版社,2000.
[10] 谢和平,陈忠辉.综放采场支承压力分布的损伤力学分析[J].岩石力学与工程学报,2000,19(4):437-438.
[11] 庞义辉,王国法.大采高液压支架结构优化设计及适应性分析[J].煤炭学报,2017,42(10):2518-2527.
[12] 唐治,潘一山,朱小景,等.自移式吸能防冲巷道超前支架设计与研究[J].煤炭学报,2016,41(4):1032-1037.
[13] 吴成峰.液压支架工作阻力确定方法[J].煤矿机械,2015,36(10):58-60.
[14] 靳钟鸣,魏锦平.放顶煤采场前支承压力分布特征[J].太原理工大学学报,2001,32(3):216-218.
[15] 吕平军.大倾角松软特厚煤层综放开采设备的选型与配套研究[J].中国煤炭,2013,39(9):66-69+128.