CAJ | 학술논문

为合理评价开采区域的冲击矿压危险程度，分析了岩-煤-岩组合体受载过程中各部分的位移、加速度、刚度及能量等物理参量的演化规律，提出了以煤体峰值后刚度和岩石卸载刚度为基本参量的组合体稳定破坏和失稳破坏的判别条件。结果表明，岩-煤-岩组合体的破坏状态由其中的煤体峰后刚度及顶底板岩石刚度k1，k2λ对比关系决定，峰值后卸载至煤体曲线刚度变化率满足λ′>kkmkku212+&&/[(12)]&的点S后，系统不再维持平衡状态，由稳定破坏转为失稳破坏。提出了采用岩-煤-岩组合体破坏过程中顶底板释放和煤体消耗的能量之比参数α作为煤岩组合条件下的冲击倾向性评价指标，并对2个矿区7个地点实际样品进行了冲击倾向性测试结果对比分析，其中有2个取样地点的顶底板会影响煤体冲击倾向性评价结果，试验结果表明，采用岩-煤-岩组合体模型比单纯煤样测试结果能更好地反映现场围岩实际条件对冲击危险的影响程度。
위합리평개개채구역적충격광압위험정도，분석료암-매-암조합체수재과정중각부분적위이、가속도、강도급능량등물리삼량적연화규률，제출료이매체봉치후강도화암석사재강도위기본삼량적조합체은정파배화실은파배적판별조건。결과표명，암-매-암조합체적파배상태유기중적매체봉후강도급정저판암석강도k1，k2λ대비관계결정，봉치후사재지매체곡선강도변화솔만족λ′>kkmkku212+&&/[(12)]&적점S후，계통불재유지평형상태，유은정파배전위실은파배。제출료채용암-매-암조합체파배과정중정저판석방화매체소모적능량지비삼수α작위매암조합조건하적충격경향성평개지표，병대2개광구7개지점실제양품진행료충격경향성측시결과대비분석，기중유2개취양지점적정저판회영향매체충격경향성평개결과，시험결과표명，채용암-매-암조합체모형비단순매양측시결과능경호지반영현장위암실제조건대충격위험적영향정도。
In order to determine the bursting danger of mining zone, and to solve the limitation of coal and rock's bursting liability evaluation criterion, the stiffness values of coal’s post-peak and rock’s un-loading process are used to evaluate the steady and unsteady failure of rock-coal-rock sample based on the analysis of deformation, acceleration, stiffness and energy variation. The research results indicate that rock-coal-rock sample’s failure state is determined by the contrast relation of coal’s post-peak stiff-ness and rock’s stiffness. There is a point S on the coal’s stress-strain curve during the unloading process where the stiffness changing ratio satisfies the relation of λ′>kkmk ku , after which the 212+&&/[(12) ]&rock-coal-rock sample’s shall not keep the balance state, and the sample's failure will convert from sta-ble to instable state. The parameter α which is the ratio of the energy that roof and floor releases to that of coal releases is used as the index of bursting liability of rock-coal-rock sample. The results of seven sites’ samples from 2 mines indicate that there are 2 samples’ bursting liability is under the influence of roof and floor attribution. The model of rock-coal-rock sample can reflect the bursting liability of in-situ surrounding rock more accurately than that of only coal.