Based on the achievement of 3D strata fracturing situation measured by microseismic monitoring techniques and field strata movement investigation，the authors present the concept of“strata spatial structure”. According to mining borders condition of longwall，strata spatial structures are divided into four shapes as follows：(1) q-shaped spatial structure with center support(coal pillar)；(2) O-shaped type spatial structure without center support(coal pillar)；(3) S-shaped；and (4) C-shaped. They are described on how to use microseismic monitoring techniques to decide the developing progress of strata spatial structure，and on how to use drill hole pressure changing rules to judge the stability of coal pillar which is surrounded by four goafs(four sides are mined areas) and under strata spatial structure. According to the drill hole pressure monitoring results in sub-level caving face goaf，the forming progress of strata spatial structures without center support(coal pillar) is described. Based on field monitoring practice，the authors discuss the applying method of microseismic monitoring techniques and drill hole pressure monitoring to the research on strata spatial structure，and show the application of the viewpoint of strata spatial structure and its research methods to mining engineering.