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出于改良矿区坡面稳定性,处理垃圾筛分土、矿石废料等,进而实现缓解城市和环境压力的目的,对不同配比的矿石废料与垃圾筛分土混合物的稳定性进行研究。使用自制直剪仪,对不同体积比例的混合物进行抗剪试验,并模拟降雨,研究雨强对混合体稳定性的影响。结果表明:矿石废料占混合土体积比在20%～60%区间内时混合体稳定性最强;降雨能通过增加剪切面的垂直应力及改变剪切面含水率来降低剪切面的剪应力,从而造成坡面稳定性的下降;50%左右的矿石废料体积比具有最佳的抗剪效果,区间下限应高于30%,上限以植被恢复的存活率为参考依据。
In order to improve the slope stability of the mining area, dispose of the garbage sieving soil and ore waste, and then to relieve the pressure of the city and the environment, the stability of mixture of different proportions of ore waste and landfill soil was studied. The self shear tester was used to test the shear strength of mixtures with different volume ratios and simulate the rainfall to study the influence of rainfall intensity on the stability of the mixture. The results show that the mixture has the strongest stability when the ore waste accounts for 20% -60% of the mixed soil volume fraction. The rainfall can reduce the shear of the mixture by increasing the vertical stress of the shear surface and changing the moisture content of the shear surface Stress, resulting in the decline of slope stability; about 50% of the volume ratio of ore waste has the best shear effect, the lower limit of the interval should be higher than 30%, the upper limit of the vegetation recovery survival rate as a reference.