## 6 Conclusions  
Based on the rare typical engineering case of gob-side roadway driving with small coal-pillar facing mining in isolated island working face under alternate mining of wide and narrow working faces, this paper studies and finds the characteristics of zoning differential distribution of surrounding rock stress and deformation of the gob-side roadway driving with small coal pillar facing mining in the special isolated island working face. Based on this, the roadway was divided into several zones, for different zones, the zoning control cooperative control technology of pressure relief and anchorage was proposed, and an industrial test was carried out. From these studies, the following conclusions were drawn:  
(1) Under the influence of strong mining in adjacent working faces, gob-side roadway driving with small coal-pillar facing mining in isolated island working face suffers from great deformation. The variation law of displacement was divided into two stages, namely, the advanced influence stage of working face (within the range of 100 m ahead) and the delayed influence stage of working face (within the range of 180 m behind). When the roadway surrounding rock was in the delayed influence stage, the disturbance influence on surrounding rock in this stage was stronger than that in advanced stage as the result of broken and rotation of high-level rock stratum isolated island. (2) According to the stress evolution law and numerical simulation results of gob-side roadway driving under face mining, during the excavating of MTR 1513, the stress concentration in the excavating face was obvious due to the influence of the advanced support stress of working face 1511. When the excavating face was located behind the working face 1511, the stress concentration of roadway surrounding rock was further strengthened due to the influence of delayed mining stress, which verified the two disturbed stages of roadway surrounding rock displacement change. (3) Based on the zoning deformation characteristics and stress evolution law of surrounding rock of gob-side roadway driving with small coal pillar under face mining, the MTR 1513 was divided into three zones. The first zone was heading face mining zone, which would not be affected by mining during roadway excavation, but would be affected by advanced mining of working face 1511 later. The second zone was the mining influenced zone, which would be affected by the advanced and delayed mining influence of working face 1511 during roadway excavation; the third zone was the mining stability zone, that is, during roadway excavation, the mining influence has tended to be stable and will no longer be affected by the disturbance of mining stress. (4) The targeted cooperative control technology of pressure relief and anchorage was proposed, and the pressure relief effect was verified by numerical simulation method. Figure 16: Photos of zone C in MTR 1513. Targeted control methods were put forward for the three zones of MTR 1513, and the differentiated control technology were formed. For the heading face mining zone (Zone A), the control method of anchoring first and then relieving pressure was adopted. For the mining influenced zone (Zone B), the control method of simultaneous cooperation of pressure relief and anchorage was adopted. For the mining stability zone (Zone C), the control method of anchoring, without pressure relief, was adopted. (5) Engineering practice shows that the disturbance influence distance of working face 1511 on MTR 1513 ranges from 110 m ahead to 175 m behind. After being affected by advanced mining, the maximum displacement of roof, solid coal side, and pillar side in Zone A were 176 mm, 152 mm, and 234 mm, respectively, with good control effect. After being affected by two stages of mining stress, large deformation of surrounding rock occurs in Zone B, but the control effect was still obviously improved. The coal and rock mass in Zone C was loose and broken after mining, but the control effect on overall deformation was good.