Full implementation of mechanized mining in Fankou lead-zinc mine

(2) Difficult mining (top and bottom column) mechanized medium-deep layer stratified filling mining method (see Figure 2). The mining method first uses a tunneling or wind drill to excavate a bottoming lane in a difficult-to-collect (top-bottom) ore body, and then uses a Boomer K41X rock drilling rig to construct an upward fan-shaped hole, and then adopts a BTIALB9EN type charging trolley. The charge is combined with the LH 307M remote-controlled scraper and the remote-controlled crushing trolley after each blasting, and the operator does not enter the gob. After the ore is recovered, the empty area is filled.

(3) Large-diameter deep-hole collapse mining method (VCR method) (see Figure 3), which accounts for about 30% of the mining method. The VCR method is improved on the basis of the original FDQ method, the bottom structure of the stope is eliminated, and the remote-controlled scraper is used to mine the bottom-hole deep hole mining. The mining and cutting works mainly include the bottom discharge chamber and the upper rock chamber. And a cutting patio. In the lower part of the stope, a bottom discharge chamber is arranged, and a rock chamber is arranged on the upper part of the stope. The cutting patio is arranged at the front end of the stope, and the cutting patio passes through the upper rock chamber and the bottom discharge chamber. The down-the-hole drilling rig is used in the deep drilling of the upper rock drilling chamber to complete the deep hole through the whole stage. After all the holes are finished according to the design, the deep holes in the upper rock drilling chamber are charged in several stages, and the backward retreats are divided. Mine, blasting uses a non-electric blasting network. The middle blasthole adopts a layered columnar positive charge, and the surrounding blastholes are positively charged with an air gap; the middle blasthole is first detonated, and multiple detonators are detonated, and each of the double detonating tube detonators is combined with a detonating bomb to detonate; the surrounding blasthole double guide The blasting line is detonated, and the blasting area in the middle of the same column is the free surface, and the middle blast hole in the same column is detonated. In the first blasting, the blasting was performed side by side with the free surface of the free surface. After each blasting, the empty field after the previous blasting was used as the free surface lateral collapse. After the blasting, the remote-controlled scraper is used for mining, and the ore is poured into the extra-pulse (panel) chute. The whole stope is blasted several times. After all the blasting is completed, the filling is carried out once.

2. Major mining equipment

In order to meet the needs of the full implementation of mechanized mining, and to play the role of equipment to ensure the safety of production, the mine has increased investment, combined with the safety of production, the introduction of remote control scraper, rock drilling rig , patio rig , broken trolley, mane Advanced mining equipment such as trolleys ensures key mining equipment and mining processes, production organization and equipment, and provides strong support for safe production. The main mining equipment is shown in Table 1.

In order to ensure the safe and efficient operation of the equipment, the mine has set up a mechanized equipment maintenance team to realize the professional overhaul and maintenance of the equipment, ensure the timely maintenance of the equipment, ensure the integrity of the main mining equipment, and provide a powerful force for the full implementation of mechanized mining. Support.

3. Production organization reform

As a state-owned old mine, due to historical reasons and other reasons, to fully implement mechanized mining, there are many influencing factors, such as the difficulty of re-planning mechanized mining after years of mining, the development of the roadway is difficult to meet the requirements of advanced equipment operation, operation The quality of personnel is difficult to meet the relatively high requirements of mechanized mining. The original production organization model is difficult to adapt to mechanized mining requirements. Therefore, optimization reform is required. In recent years, Fankou Lead-Zinc Mine has actively cooperated with research institutes to continuously improve mining methods and processes, increase investment, and introduce advanced mining equipment to meet mechanized mining requirements.

The mine reformed the production organization according to the requirements of specialization and mechanization. It has set up a patio team and a mechanized mining work area, and adjusted the functions of the production area to meet the needs of comprehensive mechanized mining. After the reform, the original deep drilling team was mainly responsible for VCR mining operations. The mechanized mining area was mainly responsible for mechanized medium-deep hole (trailer) mining operations. The patio team was responsible for the mechanized construction of the day and the chute, and other mining production teams were responsible for mechanized mining and mining site preparation. The production organization was uniformly deployed by the mine and the mining yard. The small-scale production mode originally organized by the team was transformed into a mechanized mining mode uniformly organized by the mining workshop. The main mining area was adjusted from three shifts to early-shift work. The two shifts greatly improved the realization rate of the production plan and the intrinsic safety level of the mine.

Through the reform of production organization, the mechanized mining capacity has been further improved, and the mechanized mining volume has reached a record high. In 2016, the proportion of mechanized mining exceeded 80%, and mechanized mining was basically fully realized.

4 Conclusion

(1) Fully implement safe and efficient mechanized mining, and replace the personnel with high-risk operations with equipment. For example, using a bristle trolley instead of manual pumice treatment, the safety risks are controlled from the source, and the intrinsic safety level of the mine is continuously improved.

(2) After the professional integration of labor organizations, the mechanized mining capacity has been greatly improved, and the proportion of mechanized mining has been continuously improved. It has exceeded 80% of the annual mining volume. In addition to the preparation of the stope, mechanized mining is basically realized. In addition, the change was originally organized by the team. The small-scale production mode of production, production organization planning by the mining and mining workshop level, improves the realization rate of the production plan, ensures smooth production organization, and effectively guarantees the stability of production capacity.

(3) Vigorously promote mechanized mining, promote the reform of production organization and solve the factors affecting safety production, such as realizing two shifts in major mining areas, effectively alleviating the aging problem of frontline employees and reducing the labor intensity of frontline employees. It is also more conducive to on-site safety management.

(4) Full implementation of mechanized mining has realized the centralized use, centralized management and centralized maintenance of major mining equipment, which is more conducive to the operation of equipment for safe production.