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河南省煤炭资源丰富，但有的矿区由于火山岩的作用，使煤系地层遭受破坏，导致煤层不连续或局部的无煤区。为了在大面积的火山岩喷发区了解次火山岩的侵入范围，圈定局部含煤地段，长期以来都是利用钻探或盲目凿井（集体或个体采矿者）的方法，了解边界范围或圈定含煤地段。钻探或凿井不仅工程量大，费用昂贵，而且还得不到精确、完整的次火山岩侵入区的资料。近年来，物探工作以其成本低、速度快、工作程度高、效果明显等特点在扩大煤田储量的勘查中得到了广泛的应用。本文采用微磁和电测深法探测侵入岩的边界，圈定残留煤段，效果良好。
Henan Province is rich in coal resources. However, some coal mines have destroyed the coal measures because of the volcanic activity, resulting in the discontinuous or partial coal-free zones. To understand the extent of subvolcanic activity in a large area of volcanic eruptions, delineating local coal-bearing areas has long been a method of drilling or blind-sinking (collective or individual miners) to understand the boundaries or delineate coal-bearing areas. Drilling or sinking wells is not only expensive and costly, but also does not provide accurate and complete data on the intrusion of subvolcanic rocks. In recent years, geophysical exploration has been widely applied in the exploration of expanding coal reserves because of its low cost, high speed, high degree of work and obvious effect. In this paper, the micro-magnetic and electrical sounding method to detect the boundary of intrusive rocks, delineation of residual coal, the effect is good.