小保当煤矿大采高综采支架工作阻力确定  

Determination of support working resistance at fully mechanized coal face in Xiaobaodang Coal Mine

作　　者：唐仁龙[1,2] 李龙清 丁自伟[1,2] 张杰[1,2] TANG Ren-long;LI Long-qing;DING Zi-wei;ZHANG Jie(School of Energy Engineering,Xi＇an University of Science and Technology,Xi＇an 710054,China;Key Laboratory of Western Mine Expoitation and Hazard Prevention and Control of the Ministry of Education,Xi＇an 710054,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《煤炭工程》2018年第9期4-7,共4页Coal Engineering

基　　金：国家自然科学基金项目(51504183;51774229);陕西省教育厅专项科学研究计划(17JK0486);能源学院青年教师创新项目(2210116004)

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14000k N。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。To determine the reasonable working resistance of support during high cutting fully mechanized mining in Xiaobaodang Coal Mine,according to the conditions of No. 2-2 seam,the mine pressure behavior and the support working resistance is studied in Xiaobaodang 5. 0 m high cutting fully mechanized mining face,by similar simulation,numerical simulation and dynamic load method. The results show that the first weighting interval is 68 m,and the average periodic weighting interval is 16 m,the dynamic load coefficient is 1. 31,the dynamic load coefficient increases with the working surface and the intensity of mine pressure is medium. The results indicate that,if the 1. 75 × 4. 75 m support is selected,the working resistance is 14000 k N. Because of the high mining height and the basic roof is hard,cantilever beam structure will be formed in the lower basic roof,and when the cantilever beam breaks,all its weight is borne by the support,which is too large. The results provide reference for the determination of working resistance of similar conditions.

关 键 词：大采高 综采工作面 支架工作阻力 悬臂梁 

分 类 号：TD355[矿业工程—矿井建设]