浅埋深薄基岩中厚煤层矿压显现规律
Strata Behavior Law of Medium Thick Coal Seam with Shallow Depth of Thin Bedrock
-
摘要: 针对浅埋深薄基岩中厚煤层矿压显现规律问题,采用UDEC数值模拟软件和现场实测2种方法对李家壕煤矿3-1煤层的矿压规律显现进行研究。研究表明,工作面初次来压步距20 m,周期来压步距10 m;周期来压期间,来压猛烈,历时短,工作面中部相对于两端部来压大,来压早,持续时间长;工作面前方支承压力集中不明显,影响范围较小;工作面发生台阶下沉,顶板破断运动波及地表,工作面上覆岩层中只存在垮落带和裂隙带“两带”,不存在弯曲下沉带;顶板岩梁在工作面推进方向上传递载荷的能力大大下降。数值模拟结果和现场实测数据基本吻合。Abstract: Aiming at the problem of strata behavior Law of medium thick seam with shallow depth of thin bedrock, the article studies strata behavior law for 3-1 coal seam of Lijiahao Coal Mine with UDEC numerical simulation software and field test two methods. Studies show that the first weighting step distances is 20 m, periodic weighting step distances is 10 m. During periodic pressure period, the pressure is intense, short duration, the central pressure was large, early, long duration relative to both ends of the face; the abutment pressure in front of work face was not obvious, the smaller sphere of influence; face occurred stairs sinking, floor breaking movement spreaded to the top of the surface, the working face overburden only exists caving zone and fractured zone "two zone", there is no curve subsidence zone. Strata roof beam greatly decreased ability to transfer load in the direction of face advancing. The numerical results and field data are consistent.
-
-
[1] 黄庆享. 浅埋煤层的矿压特征与浅埋煤层定义[J].岩石力学与工程学报,2002,21(8):1174-1177. [2] 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. [3] 方新秋,黄汉富,金桃,等.厚表土薄基岩煤层综放开采矿压显现规律[J].采矿与安全工程学报,2007,24 (3):326-330. [4] 宋选民,顾铁凤,闫志海.浅埋煤层大采高工作面长度增加对矿压显现的影响规律研究[J].岩石力学与工程学报,2007,26(增2):4007-4012. [5] 李国华,任艳芳,徐天发,等.厚松散层浅埋煤层工作面矿压显现规律研究[J].煤炭工程,2013(1):76. [6] 钱鸣高,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003. [7] 卢鑫,张东升,范钢伟,等.厚砂层薄基岩浅埋煤层矿压显现规律研究[J].煤矿安全,2008(9):10-12. [8] 李艳君,杨维帅,许力峰,等.浅埋深薄基岩工作面矿压显现规律研究[J].煤矿开采,2012,17(3):86-88. [9] 张李节,侯忠杰.浅埋工作面超前支承压力分布规律[J].矿山压力与顶板管理,1994(3):23-25. [10] 鲁岩,樊胜强,邹喜正.工作面超前支承压力分布规律[J].辽宁工程技术大学学报:自然科学版,2008,27(2):184-187. -
期刊类型引用(5)
1. 李慧东. 新型瓦斯抽采钻孔注浆封孔方法及封堵机理研究. 山西化工. 2023(07): 137-138+144 . 百度学术
2. 李文彬. 新元煤矿综采面瓦斯抽采技术优化及效果分析. 江西煤炭科技. 2023(03): 159-161+165 . 百度学术
3. 穆春明,孙向锋,唐家豪,王岳栩. 白坪矿煤层瓦斯抽采技术优化试验研究. 中国煤炭. 2022(03): 37-41 . 百度学术
4. 范彦阳,赵晓夏,王凯,刘军. 基于TRIZ的近水平压裂孔高效注浆封孔工艺创新研究与实践. 采矿技术. 2020(05): 60-64 . 百度学术
5. 郝晓伟. 中兴矿1415综采工作面瓦斯综合抽采技术研究与应用. 煤炭与化工. 2019(12): 90-93 . 百度学术
其他类型引用(0)
计量
- 文章访问数: 449
- HTML全文浏览量: 0
- PDF下载量: 0
- 被引次数: 5