Stability mechanism and control of the pumpable supports in longwall recovery room

The load-bearing performance(LBP)of pumpable supports(PPS)is crucial for the stability of longwall pre-driven recovery room(PRR)surrounding rock.However,the unbalanced bearing coefficient(UBC)of the PPS(undertaking unequal load along the mining direction)has not been investigated.A mechanical model of the PRR was established,considering the main roof cantilever beam structure,to derive an assessment formula for the load,the failure criteria,and the UBC of the PPS.Subsequently,the generation mechanisms,and influencing factors of the UBC were revealed.Global sensitivity analysis shows that the main roof hanging length(l_(2))and the spacing between the PPS(r)significantly impact the UBC.A novel design of the PPS and the coupling control technology were proposed and applied to reduce the UBC of the PPS in the adjacent longwall PRR.Monitor results showed no failure of the PPS at the test site,with the UBC(ζ)reduced to 1.1 consistent with the design value(1.15)basically,fully utilizing the collaborative LBP of the PPS.Finally,the maximum roof-to-floor convergence of the PRR was 234 mm,effectively controlling the stability of the surrounding rock of the PRR and ensuring the mining equipment recovery.

Nursing Practice in Recovery Room: A Case of Kibuye Hope Hospital and Mutoyi Hospital

Background: Nursing care in the recovery room is oriented to take into account the patient’s condition after surgery intervention with its main purpose of providing direct and continuous patient observation in emergence from general or regional anesthesia. In the absence of professional assistance, patients can develop complications that can lead them into shock or death. This study aims to understand the place of nurses in guiding nursing care in recovery room in two hospitals of Gitega Province by assessing the nurse’s knowledge and attitudes for the promotion of quality nursing care for post-operative patients. Methods: A cross sectional study design was used to assess the practice of nurses in managing nursing care in the recovery room in these two hospitals. A purposive sampling method was used to select the 82 nurses working in the recovery room for these two hospitals and Alain Bouchard’s formula was used to calculate the sample size. Data were collected using a self-report method involving questionnaire completion with five components addressing participants identifications, factors related to the work organization, factors related to the work environment, factors related to healthcare system, and nursing interventions in recovery room. Results: Findings revealed a significant lack of knowledge among the participants and their attitudes were slightly poor as for most of the variables of factors related to healthcare system as their score was less than 50% and their knowledge for nursing interventions was also poor as most of variable scores were less than 25%. Conclusions: The study findings were slightly poor as their scores were less than 50% in most of the variables;therefore, it was recommended that in-service training and workshops should be organized by these healthcare facilities for the purpose of empowering the nurse’s knowledge and practice. Moreover, these institutions should provide and encourage nurses to use nursing guidelines and protocols.