Method for combined exploitation of coal and its associated oil shales
A combined mining and oil shale technology, applied in surface mining, earth drilling, underground mining, etc., can solve the problems of increased difficulty in mining technology, unfavorable mining, interference, etc., to reduce the difficulty of surrounding rock control and reduce roadway excavation Quantity, the effect of adjusting the energy structure
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[0031] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0032] The present invention aims at the joint exploitation of two kinds of resources under the condition that coal and its associated oil shale occur at close distances. The specific steps of the method are as follows:
[0033]1) Firstly, determine the reasonable mining interval between the coal seam (6) and its associated oil shale (4). According to the actual geological occurrence of coal, refer to the formula listed in "Buildings, water bodies, railways and main shaft coal pillars and coal pressure mining regulations" to calculate the mining time of the lower coal seam (6) after mining by caving method The maximum height of the caving zone (3) and the fissure zone (2) in the overlying strata of the goaf (8) determines the interlayer distance range between the coal seam (6) and its upper associated oil shale (4). When the lower coal seam...
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