###### Abstract
Good results have been obtained in field tests to determine the best cutting height and support width where the deformation of the roof is controlled by a short cantilever beam [12]. The supporting technology of a constant resistance, large deformation anchor cable has been developed, which has been shown to achieve low deformation of the roadway and a remarkable control effect [13]. The proposal of this method to automatically make a roadway without coal pillars has ended the phase in the history of coal mining in which roadways must be excavated before coal mining. This is a major change in coal mining technology and one of the important developments in the sustainable mining of coal resources. A large number of high-tech monitoring technologies have been applied in practical engineering contexts to meet requirements as to engineering quality and the safety of personnel and equipment. For example, in earthquake monitoring, cloud computing information services enable more rapid algorithmic seismic data processing [14] and using Voronoi technology and cloud services greatly improves the accuracy of seismic activity calculations [15]. In slope monitoring, the development of a mechanical calculation model of striatal structure and its combination with a monitoring system allows areas that pose a high inclined rock burst hazard to be identified and stratum ruptures and movements to be monitored [16]. In coal gasification monitoring, acoustic emission monitoring plays an important role in site safety and can effectively reduce underground coal gasification (UCG) risk [17]. Furthermore, the combined use of a wireless sensor network and a coal mine safety monitoring system has been shown to be an effective measure to eliminate the hidden danger of gas accidents. Its ability to acquire a large amount of data, high accuracy and low environmental impact make it far superior to traditional gas sensing systems [18]. In roof monitoring, a sensor network using wireless communication has been used to monitor the health of the underground pillar roof in real time and to predict roof fall [19]. A wide variety of mine pressure monitoring equipment such as three-dimensional laser roadway displacement monitoring [20] is also used in coal mining, utilizing three-dimensional modeling, RFID/INC (Radio Frequency Identification) integrated positioning systems and other advanced systems that enable the real-time understanding of the underground orebody [21]. The newly developed technology of a wireless mine security information system can save space and ensure the safe mining of coal [22]. This involves the use of a wireless sensor network and associated communication technology supported by a cloud network for coal mine safety monitoring, enabling automatic processing of underground data and transmission to wells. Such a system offers high accuracy and good stability and is considered to be the future direction of coal mine safety inspection [23; 24; 25]. In addition, the installation of a breaker line support (BLS) monitoring system in Laleham 1 Coal Mine and the real-time transmission of data above-ground have been shown to be beneficial for promoting mechanized pillar mining operations [26]. [PERSON] et al. developed a mining stress monitoring sensor and applied it in the field at the Liangbei coal mine [27]. [PERSON] et al. developed and applied a three-way cylinder pressure sensor and a dynamic monitoring system for coal and rock mass stress that was able to determine the distribution and the evolution law of stope stress [28]. [PERSON] has discussed a data integration technology for coal mine safety monitoring systems [29], whereas [PERSON] et al. have established a dynamic monitoring system for surrounding rock deformation based on distributed optical fiber sensing technology [30]. [PERSON] [31], [PERSON] [32] and others have also conducted relevant research and achieved useful results.