CAJ | 학술논문

采用理论分析、物理相似模拟与工程实践相结合的方法，对坚硬厚层顶板群结构的破断冲击效应进行了分析，得到了工作面采场冲击来压的主要影响因素、来压特征及工作面合理支护强度等。研究表明：多分层坚硬顶板群结构的破断冲击载荷在短时间内会产生剧烈的震荡；工作面来压特征受多分层顶板垮断的动、静载荷联合作用；采场冲击来压强度主要与顶板厚度、岩性及节理弱面有关，对于岩性相近的顶板岩层，厚度越大，对采场的矿压冲击影响也越剧烈，但厚层顶板垮断后的结构对其上覆顶板岩层的冲击载荷强度具有一定的缓冲。以大同矿区坚硬顶板群结构下的煤层开采为例，通过在综放工作面选择应用ZF15000/28/52型高强度支架，保证了首个关键层顶板破断前后的安全开采；同时，采取水压致裂辅助控制上部关键层顶板，有效减缓了工作面强矿压的显现。
채용이론분석、물리상사모의여공정실천상결합적방법，대견경후층정판군결구적파단충격효응진행료분석，득도료공작면채장충격래압적주요영향인소、래압특정급공작면합리지호강도등。연구표명：다분층견경정판군결구적파단충격재하재단시간내회산생극렬적진탕；공작면래압특정수다분층정판과단적동、정재하연합작용；채장충격래압강도주요여정판후도、암성급절리약면유관，대우암성상근적정판암층，후도월대，대채장적광압충격영향야월극렬，단후층정판과단후적결구대기상복정판암층적충격재하강도구유일정적완충。이대동광구견경정판군결구하적매층개채위례，통과재종방공작면선택응용ZF15000/28/52형고강도지가，보증료수개관건층정판파단전후적안전개채；동시，채취수압치렬보조공제상부관건층정판，유효감완료공작면강광압적현현。
ABSTRACT A comprehensive research method composed of theoretical analysis, physical simulation and engineering practice was conducted to analyze the impact effect caused by thick hard roof group structure breaking. Some results were obtained such as the main influencing factors related to impulsion pressure, the main roof weighting characteristics and the reasonable supporting strength of the roof group structure. It is shown that impact load caused by layered hard roof group structure breaking will lead to severe concussion with scarcely attenuation. The roof weighting on the workface is affected by a combined effect of dynamic load and static load resulted from layered hard roof group structure breaking. The impulsion pressure strength is associated to roof thickness, rock traits, and rock joints and weak surfaces. For the similar roof strata, the impact effect is more severe as the roof is thicker, but the thick caving roof will be helpful for buffering the impact of the upper overburden strata. A field test was conducted in Datong area which is mining under the hard roof group structure. According to selecting the high strength supports of ZF15000/28/52 in the fully mechanized caving face to ensure safe mining before and after the first critical roof breaking, and taking the auxiliary control of hydraulic fracturing in the upper critical roof, the strong pressure has been effectively slowed.