The purpose of this paper is to solve drainage problems of coal mining subsidence area with high groundwater level ,while improving the utilization rate of mine solid wastes including coal gangue and fly ash .This paper carried out a test on the new porous concrete drainage ditch with coal gangue and fly ash . Two experiments was designed ,one was the test of permeability coefficient and compressive strength of the concrete with coal gangue and fly ash .Five treatments were set up ,respectively using coal gangue instead of 25% and 15% aggregate ,fly ash instead 10% and 15% cement ,also included a blank control group ;Another was the test for the permeable rate of indoor simulated drainage ditch by choosing the concrete mix proportion of treatment 5 which had the maximum permeability coefficient and met the compressive strength standard in experiment one .It was proved that the concrete with coal gangue and fly ash had better water permeability ,and the largest one was treatments 5(coal gangue instead of 30% gravel and fly ash instead of 15% cement) .Besides ,the compressive strength of it was 12 .03MPa ,meeting the standard ;the permeable rate of indoor simulation of farmland drainage ditch was 0 .072cm/h and the modulus of subsurface drainage can reach 0 .01m3/(s .km2 ) when assuming it was applied in the field .The results indicated that this kind of concrete can be applied in the area in which the modulus of subsurface drainage is not larger than the value . The porous concrete drainage ditch with coal gangue and fly ash will have a broad application prospect ;this study can provide supporting for its application .%为了解决高潜水位采煤塌陷区的排水问题，同时提高矿山固体废弃物煤矸石粉煤灰的利用率，本文开展了新型透水性煤矸石粉煤灰混凝土排水沟试验研究。本研究设计了两个试验，一是煤矸石粉煤灰混凝土透水系数和抗压强度测定试验：共设置了五个试验处理，分别以煤矸石代替25％和15％的碎石，粉煤灰替代10％和15％的水泥，同时包括一个空白对照组；二是室内模拟排水沟透水率测定试验：选取试验一中透水系数最大，且满足抗压强度标准的处理5的混凝土配合比（煤矸石替代碎石量为30％，粉煤灰替代水泥量为15％），进行室内排水沟模拟试验。结果表明：煤矸石粉煤灰混凝土具有较好的透水性，试验一处理5的混凝土块透水系数最大，其抗压强度为12．03M Pa ，满足抗压强度标准；室内模拟农田排水沟的透水率为0．072cm／h ，在田间应用排渍模数可达0．01m3／（s ．km2），该混凝土在排渍模数不大于该值的地区可以应用，具有广阔的应用前景。
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