An accurate breakthrough was recently achieved at decline of Musonoi Copper Mine between 400ml to 320ml with a total length of 920m, after 9 months of hard work, marking another triumph in ultra-long single-end development, following the successful breakthrough between main shaft & 1# vent shaft at 400mL on May 14th, which significantly facilitates subsequent works including underground mucking and the lowering of large equipment.
During the decline development, multiple challenges were encountered due to complex geological and hydrological conditions, such as faults, fracture aquifers, soft calcareous silt stones, not to mention difficulties brought by long-distance single-end development such as ventilation and drainage problems. Technical & Quality Department was required to strengthen quality control and safety management, attach great importance to the accuracy of survey and measurement so as to achieve accurate breakthrough.
Considering the adverse impact of large water inflow on underground survey, especially on the orientation of 1# vent shaft, it was decided to use gyroscopic total station for positioning upon brainstorming and repeated investigations and demonstrations to ensure successful breakthrough.
This breakthrough marks a big step for Kingko in shaft sinking and transfer between vertical to lateral development, it also fully demonstrates the technical strength and work capabilities.
