煤炭工程 ›› 2018, Vol. 50 ›› Issue (9): 4-7.doi: 10.11799/ce201809002

• 设计技术 • 上一篇    下一篇

小保当煤矿大采高综采支架工作阻力确定

唐仁龙   

  1. 西安科技大学
  • 收稿日期:2018-04-09 修回日期:2018-06-14 出版日期:2018-09-20 发布日期:2018-12-18
  • 通讯作者: 唐仁龙 E-mail:Trlong@xust.edu.cn

Parameters Determination of Support Working Resistance at Fully Mechanized Coal Face in Xiaobaodang Coal Mine

  • Received:2018-04-09 Revised:2018-06-14 Online:2018-09-20 Published:2018-12-18

摘要: 为合理确定小保当煤矿大采高综采面支架工作阻力,针对小保当煤矿2-2煤层的具体情况,采用物理相似模拟、数值模拟实验和理论计算相结合的方法,对小保当5.0m大采高工作面矿压显现规律及支架工作阻力进行研究。研究得出小保当矿基本顶初次垮落步距68m,周期垮落步距为16m,增载系数为1.31,来压显现强度中等。综合分析,若选用1.75m×4.75m支架,确定大采高综采工作面支架工作阻力为14000kN。由于采高较大,基本顶岩性较坚硬,来压期间基本顶下位岩层形成“悬臂梁”结构,“悬臂梁”断裂时,其重量全部由支架承担,支架载荷大。研究结果为同类地质条件支架工作阻力选型提供了借鉴。

关键词: 大采高, 综采工作面, 支架工作阻力, 悬臂梁

Abstract: To determine the reasonable working resistance of support during fully mechanized mining wi-th large mining height in Xiaobaodang coal mine, According to the certain- conditions of No. 2-2 seam, By similar simulation and numerical simulation and dynamicload method study the strata observation lawand support working resistance. The results show that the first weighting step distance is 68m,and the a-verage periodic weighting step distance is 16m. the dynamic load coefficient is 1.31, The dynamic load coefficient increases with the working surface and the intensity of mine pressure is medium. Comprehen-sive analysis If the 1.75×4.75m support was selected, the working resistance was determined to be 14000kN. Because of the high mining height and the basic roof is hard. The lower basic roof appeared in the process of cantilever beam structure, when the cantilever beam breaks, all its weight is borne by the s-upport, the support loading is large. The results provide reference for the determination of working resis-tance of similar conditions.

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