以陕北侏罗纪煤田凉水井煤矿为例,研究了浅埋煤层开采涌水量规律,根据煤矿井下水样的氢氧同位素构成,计算了矿井水的来源.该区矿井水接受风化基岩裂隙承压水和萨拉乌苏组潜水的补给,矿井水8D为-70‰,裂隙水8D为-80‰,萨拉乌苏组潜水8D为-67.46‰,由此可以计算出矿井水的补给来源主要是萨拉乌苏组地下水,萨拉乌苏组潜水补给占79.74％,基岩裂隙水补给占20.26％,据此提出该区保水采煤重点是保护萨拉乌苏组地下水含水结构的稳定性.%Taking the liangshuijing coalmine in the northern Shaanxi Jurassic coalfield as an example, studied the regular pattern of water inflow during shallow buried coal seams mining. Based on hydrogen and oxygen isotopic composition of water samples from coalmine underground, discriminated mine water source. The mine water in the area accepts recharges from weathered bedrock fissure confined water and Xar Us Formation phreatic water. The 8D of mine water is -70%0, fissure water -80%o and phreatic water -67.46%0, thus the main recharging source of mine water is from the Xar Us Formation groundwater can be calculated, the percent sharing of phreatic water is 79.74%, bedrock fissure water 20.26%. In view of the above, the emphasis on water conservation coal mining is to protect stability of Xar Us Formation water-bearing structure.
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